started v.0.0.1

2025-12-06 02:35:14 +03:00 · 2025-01-27 14:57:27 +03:00 · 2025-01-27 14:57:27 +03:00 · 1d7c7b7d0e
commit 1d7c7b7d0e
parent 66e154ab6a
17 changed files with 1324 additions and 0 deletions
--- a/Auxiliary_utils/libastrotools/CMakeLists.txt
+++ b/Auxiliary_utils/libastrotools/CMakeLists.txt
@ -0,0 +1,96 @@
+cmake_minimum_required(VERSION 3.30)
+set(PROJ astrotools)
+set(MINOR_VERSION "1")
+set(MID_VERSION "0")
+set(MAJOR_VERSION "0")
+set(VERSION "${MAJOR_VERSION}.${MID_VERSION}.${MINOR_VERSION}")
+
+project(${PROJ} VERSION ${VERSION} LANGUAGES C)
+
+# default flags
+set(CMAKE_C_FLAGS "${CFLAGS} -O2")
+set(CMAKE_C_FLAGS_RELEASE "${CMAKE_C_FLAGS}")
+set(CMAKE_C_FLAGS_DEBUG "${CMAKE_C_FLAGS} -Wextra -Wall -Werror -W")
+set(CMAKE_COLOR_MAKEFILE ON)
+
+option(DEBUG "Compile in debug mode" OFF)
+option(EXAMPLES "Compile also some examples" ON)
+
+# cmake -DDEBUG=on -> debugging
+if(NOT CMAKE_BUILD_TYPE STREQUAL "Debug")
+    if(DEBUG)
+        set(CMAKE_BUILD_TYPE "Debug")
+    else()
+        set(CMAKE_BUILD_TYPE "Release")
+    endif()
+endif()
+
+if(CMAKE_BUILD_TYPE STREQUAL "Debug")
+	add_definitions(-DEBUG)
+	set(CMAKE_VERBOSE_MAKEFILE true)
+	if(CMAKE_INSTALL_PREFIX_INITIALIZED_TO_DEFAULT)
+		message("install to ${CMAKE_CURRENT_SOURCE_DIR}/install ")
+		set(CMAKE_INSTALL_PREFIX ${CMAKE_CURRENT_SOURCE_DIR}/install)
+	endif()
+	set(CMAKE_C_FLAGS ${CMAKE_C_FLAGS_DEBUG})
+else()
+	set(CMAKE_C_FLAGS ${CMAKE_C_FLAGS_RELEASE})
+endif()
+
+message("Build type: ${CMAKE_BUILD_TYPE}, cflags: ${CMAKE_C_FLAGS}")
+
+aux_source_directory(${CMAKE_CURRENT_SOURCE_DIR} SOURCES)
+
+###### pkgconfig ######
+# pkg-config modules (for pkg-check-modules)
+#set(MODULES cfitsio fftw3)
+# find packages:
+#find_package(PkgConfig REQUIRED)
+#pkg_check_modules(${PROJ} REQUIRED ${MODULES})
+
+# external modules like OpenMP:
+include(FindOpenMP)
+if(OPENMP_FOUND)
+    set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${OpenMP_C_FLAGS}")
+    set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} ${OpenMP_EXE_LINKER_FLAGS}")
+    add_definitions(-DOMP_FOUND)
+endif()
+###### additional flags ######
+#list(APPEND ${PROJ}_LIBRARIES "-lfftw3_threads")
+
+# exe file
+#add_executable(${PROJ} ${SOURCES})
+# library
+add_library(${PROJ} SHARED ${SOURCES})
+# library header files
+set(LIBHEADER "astrotools.h")
+# -I
+include_directories(${${PROJ}_INCLUDE_DIRS})
+# -L
+link_directories(${${PROJ}_LIBRARY_DIRS})
+# -D
+add_definitions(
+        -DPACKAGE_VERSION=\"${VERSION}\" -DMINOR_VERSION=\"${MINOR_VERSION}\"
+        -DMID_VERSION=\"${MID_VERSION}\" -DMAJOR_VERSION=\"${MAJOR_VESION}\"
+)
+
+# -l
+target_link_libraries(${PROJ} ${${PROJ}_LIBRARIES})
+
+set(PCFILE "${CMAKE_BINARY_DIR}/${PROJ}.pc")
+configure_file("${PROJ}.pc.in" ${PCFILE} @ONLY)
+
+set_target_properties(${PROJ} PROPERTIES VERSION ${VERSION})
+set_target_properties(${PROJ} PROPERTIES PUBLIC_HEADER ${LIBHEADER})
+
+# Installation of the program
+include(GNUInstallDirs)
+#install(TARGETS ${PROJ} DESTINATION "bin")
+install(TARGETS ${PROJ} LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
+        PUBLIC_HEADER DESTINATION ${CMAKE_INSTALL_INCLUDEDIR})
+install(FILES ${PCFILE} DESTINATION ${CMAKE_INSTALL_DATAROOTDIR}/pkgconfig)
+
+# EXAMPLES
+if(EXAMPLES)
+    add_subdirectory(examples)
+endif()
--- a/Auxiliary_utils/libastrotools/Changelog
+++ b/Auxiliary_utils/libastrotools/Changelog
@ -0,0 +1,11 @@
+2025/01/27: Ver. 0.0.1
+Base operations: 
+- set/get place, weather, DUT1 and polar move
+- dynamic string and conversion of time and angle to human-readable string
+- get julian date with all need components (including MJD) by timeval, UNIX time and full julian date; get local sidereal time
+- convert RADEC <> AZ
+- get ha/ra by ra/ha and LST
+- get observed place for given location/weather/polar data of place or star (with pm etc)
+- get catalog mean position of coordinates for given epoch and observed place
+
+
--- a/Auxiliary_utils/libastrotools/Readme.md
+++ b/Auxiliary_utils/libastrotools/Readme.md
@ -0,0 +1,4 @@
+Astrotools
+==========
+
+Simplest wrapper over ERFA (or/and other libraries).
--- a/Auxiliary_utils/libastrotools/astrotools.cflags
+++ b/Auxiliary_utils/libastrotools/astrotools.cflags
@ -0,0 +1 @@
+-std=c17
--- a/Auxiliary_utils/libastrotools/astrotools.config
+++ b/Auxiliary_utils/libastrotools/astrotools.config
@ -0,0 +1,6 @@
+// Add predefined macros for your project here. For example:
+// #define THE_ANSWER 42
+#define EBUG
+#define _POSIX_C_SOURCE
+#define PACKAGE_VERSION  "0.0.1"
+
--- a/Auxiliary_utils/libastrotools/astrotools.creator
+++ b/Auxiliary_utils/libastrotools/astrotools.creator
@ -0,0 +1 @@
+[General]
--- a/Auxiliary_utils/libastrotools/astrotools.creator.user
+++ b/Auxiliary_utils/libastrotools/astrotools.creator.user
@ -0,0 +1,184 @@
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+++ b/Auxiliary_utils/libastrotools/astrotools.creator.user.7bd84e3
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+      <value type="bool" key="GenericProjectManager.GenericMakeStep.Clean">false</value>
+      <value type="QString" key="GenericProjectManager.GenericMakeStep.MakeArguments"></value>
+      <value type="QString" key="GenericProjectManager.GenericMakeStep.MakeCommand"></value>
+      <value type="bool" key="GenericProjectManager.GenericMakeStep.OverrideMakeflags">false</value>
+      <value type="bool" key="ProjectExplorer.BuildStep.Enabled">true</value>
+      <value type="QString" key="ProjectExplorer.ProjectConfiguration.DefaultDisplayName">Сборка</value>
+      <value type="QString" key="ProjectExplorer.ProjectConfiguration.DisplayName"></value>
+      <value type="QString" key="ProjectExplorer.ProjectConfiguration.Id">GenericProjectManager.GenericMakeStep</value>
+     </valuemap>
+     <value type="int" key="ProjectExplorer.BuildStepList.StepsCount">1</value>
+     <value type="QString" key="ProjectExplorer.ProjectConfiguration.DefaultDisplayName">Очистка</value>
+     <value type="QString" key="ProjectExplorer.ProjectConfiguration.DisplayName"></value>
+     <value type="QString" key="ProjectExplorer.ProjectConfiguration.Id">ProjectExplorer.BuildSteps.Clean</value>
+    </valuemap>
+    <value type="int" key="ProjectExplorer.BuildConfiguration.BuildStepListCount">2</value>
+    <value type="bool" key="ProjectExplorer.BuildConfiguration.ClearSystemEnvironment">false</value>
+    <valuelist type="QVariantList" key="ProjectExplorer.BuildConfiguration.UserEnvironmentChanges"/>
+    <value type="QString" key="ProjectExplorer.ProjectConfiguration.DefaultDisplayName">По умолчанию</value>
+    <value type="QString" key="ProjectExplorer.ProjectConfiguration.DisplayName">По умолчанию</value>
+    <value type="QString" key="ProjectExplorer.ProjectConfiguration.Id">GenericProjectManager.GenericBuildConfiguration</value>
+   </valuemap>
+   <value type="int" key="ProjectExplorer.Target.BuildConfigurationCount">1</value>
+   <valuemap type="QVariantMap" key="ProjectExplorer.Target.DeployConfiguration.0">
+    <valuemap type="QVariantMap" key="ProjectExplorer.BuildConfiguration.BuildStepList.0">
+     <value type="int" key="ProjectExplorer.BuildStepList.StepsCount">0</value>
+     <value type="QString" key="ProjectExplorer.ProjectConfiguration.DefaultDisplayName">Развёртывание</value>
+     <value type="QString" key="ProjectExplorer.ProjectConfiguration.DisplayName"></value>
+     <value type="QString" key="ProjectExplorer.ProjectConfiguration.Id">ProjectExplorer.BuildSteps.Deploy</value>
+    </valuemap>
+    <value type="int" key="ProjectExplorer.BuildConfiguration.BuildStepListCount">1</value>
+    <value type="QString" key="ProjectExplorer.ProjectConfiguration.DefaultDisplayName">Конфигурация развёртывания</value>
+    <value type="QString" key="ProjectExplorer.ProjectConfiguration.DisplayName"></value>
+    <value type="QString" key="ProjectExplorer.ProjectConfiguration.Id">ProjectExplorer.DefaultDeployConfiguration</value>
+   </valuemap>
+   <value type="int" key="ProjectExplorer.Target.DeployConfigurationCount">1</value>
+   <valuemap type="QVariantMap" key="ProjectExplorer.Target.PluginSettings"/>
+   <valuemap type="QVariantMap" key="ProjectExplorer.Target.RunConfiguration.0">
+    <value type="int" key="PE.EnvironmentAspect.Base">2</value>
+    <valuelist type="QVariantList" key="PE.EnvironmentAspect.Changes"/>
+    <value type="QString" key="ProjectExplorer.CustomExecutableRunConfiguration.Executable"></value>
+    <value type="QString" key="ProjectExplorer.ProjectConfiguration.DefaultDisplayName">Особая программа</value>
+    <value type="QString" key="ProjectExplorer.ProjectConfiguration.DisplayName"></value>
+    <value type="QString" key="ProjectExplorer.ProjectConfiguration.Id">ProjectExplorer.CustomExecutableRunConfiguration</value>
+    <value type="QString" key="RunConfiguration.Arguments"></value>
+    <value type="uint" key="RunConfiguration.QmlDebugServerPort">3768</value>
+    <value type="bool" key="RunConfiguration.UseCppDebugger">false</value>
+    <value type="bool" key="RunConfiguration.UseCppDebuggerAuto">true</value>
+    <value type="bool" key="RunConfiguration.UseMultiProcess">false</value>
+    <value type="bool" key="RunConfiguration.UseQmlDebugger">false</value>
+    <value type="bool" key="RunConfiguration.UseQmlDebuggerAuto">true</value>
+    <value type="QString" key="RunConfiguration.WorkingDirectory"></value>
+    <value type="QString" key="RunConfiguration.WorkingDirectory.default"></value>
+   </valuemap>
+   <value type="int" key="ProjectExplorer.Target.RunConfigurationCount">1</value>
+  </valuemap>
+ </data>
+ <data>
+  <variable>ProjectExplorer.Project.TargetCount</variable>
+  <value type="int">1</value>
+ </data>
+ <data>
+  <variable>ProjectExplorer.Project.Updater.FileVersion</variable>
+  <value type="int">22</value>
+ </data>
+ <data>
+  <variable>Version</variable>
+  <value type="int">22</value>
+ </data>
+</qtcreator>
--- a/Auxiliary_utils/libastrotools/astrotools.cxxflags
+++ b/Auxiliary_utils/libastrotools/astrotools.cxxflags
@ -0,0 +1 @@
+-std=c++17
--- a/Auxiliary_utils/libastrotools/astrotools.files
+++ b/Auxiliary_utils/libastrotools/astrotools.files
@ -0,0 +1,7 @@
+CMakeLists.txt
+astrotools.h
+erfa.c
+erfa.c
+examples/CMakeLists.txt
+examples/coordstest.c
+examples/transform.c
--- a/Auxiliary_utils/libastrotools/astrotools.h
+++ b/Auxiliary_utils/libastrotools/astrotools.h
@ -0,0 +1,127 @@
+/*
+ * This file is part of the astrotools project.
+ * Copyright 2025 Edward V. Emelianov <edward.emelianoff@gmail.com>.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include <erfa.h>
+#include <erfam.h>
+#include <libnova/libnova.h>
+#include <sys/time.h>
+#include <time.h>
+
+#ifndef FALSE
+#define FALSE (0)
+#endif
+
+#ifndef TRUE
+#define TRUE (1)
+#endif
+
+#ifndef ERFA_DR2S
+#define ERFA_DR2S 1.3750987083139757010431557155385240879777313391975e4
+#endif
+
+typedef struct{
+    double utc1; double utc2; // UTC JD, commonly used MJD = utc1+utc2-2400000.5
+    double MJD;
+    double tai1; double tai2; // TAI JD
+    double tt1;  double tt2;  //  TT JD
+} at_MJD_t;
+
+// equatorial coordinates & equation of origins (all in radians)
+typedef struct{
+    double ha;  // hour angle
+    double ra;  // right ascencion
+    double dec; // declination
+    double eo;  // equation of origins
+} at_equat_t;
+
+// horizontal coordinates (all in radians)
+typedef struct{
+    double az; // azimuth, 0 @ south, positive clockwise
+    double zd; // zenith distance
+} at_horiz_t;
+
+// observational place coordinates and altitude; all angle coordinates are in radians!
+typedef struct{
+    double longitude;   // longitude
+    double latitude;    // latitude
+    double altitude;    // altitude, m
+} at_place_t;
+
+// place weather data
+typedef struct{
+    double relhum;  // rel. humidity, 0..1
+    double phpa;    // atm. pressure (hectopascales)
+    double tdegc;   // temperature, degrC
+} at_weather_t;
+
+// DUT/polar almanach data
+typedef struct{
+    double DUT1;    // UT1-UTC, sec
+    double px;      // polar coordinates, arcsec
+    double py;
+} at_dut_t;
+
+typedef struct{
+    char *str;
+    size_t maxlen;
+    size_t strlen;
+} at_string_t;
+
+typedef struct{
+    double pmRA;        // proper motion (radians/year)
+    double pmDec;
+    double parallax;    // (arcsec)
+    double radvel;      // radial velocity (km/s, positive if receding)
+} at_star_t;
+
+int at_getPlace(at_place_t *p);
+int at_setPlace(at_place_t *p);
+int at_getWeath(at_weather_t *w);
+int at_setWeath(at_weather_t *w);
+int at_getDUT(at_dut_t *a);
+int at_setDUT(at_dut_t *a);
+void at_setEffWvl(double w);
+
+// strings
+int at_chkstring(at_string_t *s, size_t minlen);
+at_string_t *at_newstring(size_t maxlen);
+void at_delstring(at_string_t **s);
+const char *at_libversion();
+
+// human readable
+int at_radtoHdeg(double r, at_string_t *s);
+int at_radtoHtime(double r, at_string_t *s);
+
+// time-date
+int at_get_MJDt(struct timeval *tval, at_MJD_t *mjd);
+int at_get_MJDu(double UNIXtime, at_MJD_t *mjd);
+int at_get_MJDj(double JD, at_MJD_t *mjd);
+double at_get_LST(at_MJD_t *mjd);
+
+// coordinates
+void at_hor2eq(at_horiz_t *h, at_equat_t *pc, double LST);
+void at_eq2hor(at_equat_t *pc, at_horiz_t *h);
+double at_getRA(at_equat_t *pc, double LST);
+double at_getHA(at_equat_t *pc, double LST);
+int at_get_ObsPlace(at_MJD_t *MJD, at_equat_t *p2000, at_equat_t *pnow, at_horiz_t *hnow);
+int at_get_ObsPlaceStar(at_MJD_t *MJD, at_equat_t *p2000, at_star_t *star, at_equat_t *pnow, at_horiz_t *hnow);;
+int at_get_mean(at_MJD_t *MJD, at_equat_t *pnow, at_equat_t *p2000);
+int at_obs2catP(at_MJD_t *MJD, at_equat_t *pnow, at_equat_t *p2000);
+int at_obs2catA(at_MJD_t *MJD, at_horiz_t *hnow, at_equat_t *p2000);
--- a/Auxiliary_utils/libastrotools/astrotools.includes
+++ b/Auxiliary_utils/libastrotools/astrotools.includes
@ -0,0 +1,2 @@
+. 
+..
--- a/Auxiliary_utils/libastrotools/astrotools.pc.in
+++ b/Auxiliary_utils/libastrotools/astrotools.pc.in
@ -0,0 +1,10 @@
+prefix=@CMAKE_INSTALL_PREFIX@
+exec_prefix=${prefix}
+libdir=${exec_prefix}/lib
+includedir=${prefix}/include
+
+Name: @PROJ@
+Description: simplest astrotools @ ERFA and NOVA
+Version: @VERSION@
+Libs: -L${libdir} -l@PROJ@
+Cflags: -I${includedir}
--- a/Auxiliary_utils/libastrotools/erfa.c
+++ b/Auxiliary_utils/libastrotools/erfa.c
@ -0,0 +1,481 @@
+/*
+ * This file is part of the astrotools project.
+ * Copyright 2025 Edward V. Emelianov <edward.emelianoff@gmail.com>.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <pthread.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <usefull_macros.h>
+
+#include "astrotools.h"
+
+#define ERFA(f, ...) do{if(f(__VA_ARGS__)){WARNX("Error in " #f); return FALSE;}}while(0)
+
+/*********** default parameters (could/should be changed by setters) ***********/
+// default - BTA
+static at_place_t s_pldata = {
+    .longitude = 0.7232763200,
+    .latitude = 0.7618977414,
+    .altitude = 2070.0
+};
+static pthread_mutex_t s_pldata_m = PTHREAD_MUTEX_INITIALIZER;
+// default weather
+static at_weather_t s_weather = {
+    .relhum = 0.5,
+    .phpa = 800.,
+    .tdegc = 0.
+};
+static pthread_mutex_t s_weather_m = PTHREAD_MUTEX_INITIALIZER;
+// default DUT1 and polar motion
+static at_dut_t s_dut = {
+    .DUT1 = -0.01697,
+    .px = 0.,
+    .py = 0.
+};
+static pthread_mutex_t s_dut_m = PTHREAD_MUTEX_INITIALIZER;
+
+// eff. wavelength for observed place calculation
+static double s_effwavelength = 0.5;
+
+/**
+ * @brief at_getPlace - get stored place data
+ * @param p (o) - data
+ * @return FALSE if !p
+ */
+int at_getPlace(at_place_t *p){
+    if(!p) return FALSE;
+    pthread_mutex_lock(&s_pldata_m);
+    *p = s_pldata;
+    pthread_mutex_unlock(&s_pldata_m);
+    return TRUE;
+}
+/**
+ * @brief at_setPlace - change stored place data
+ * @param p (i) - new place
+ * @return FALSE if !p or p is wrong
+ */
+int at_setPlace(at_place_t *p){
+    if(!p) return FALSE;
+    if(p->longitude > ERFA_DPI || p->longitude < -ERFA_DPI
+       || p->latitude > ERFA_DPI/2 || p->latitude < -ERFA_DPI/2) return FALSE;
+    pthread_mutex_lock(&s_pldata_m);
+    s_pldata = *p;
+    pthread_mutex_unlock(&s_pldata_m);
+    return TRUE;
+}
+
+/**
+ * @brief at_getWeath - get last stored weather data
+ * @param w (o) - weather
+ * @return FALSE if !w
+ */
+int at_getWeath(at_weather_t *w){
+    if(!w) return FALSE;
+    pthread_mutex_lock(&s_weather_m);
+    *w = s_weather;
+    pthread_mutex_unlock(&s_weather_m);
+    return TRUE;
+}
+/**
+ * @brief at_setWeath - set new weather data
+ * @param w (i) - new weather
+ * @return FALSE if !w or w is wrong
+ */
+int at_setWeath(at_weather_t *w){
+    if(!w) return FALSE;
+    if(w->phpa < 0 || w->phpa > 2000 ||
+       w->relhum < 0. || w->relhum > 1. ||
+       w->tdegc < -273.15 || w->tdegc > 100.) return FALSE;
+    pthread_mutex_lock(&s_weather_m);
+    s_weather = *w;
+    pthread_mutex_unlock(&s_weather_m);
+    return TRUE;
+}
+
+/**
+ * @brief at_getDUT - get last stored DUT1 and polar motion data
+ * @param a (o) - data
+ * @return FALSE if !a
+ */
+int at_getDUT(at_dut_t *a){
+    if(!a) return FALSE;
+    pthread_mutex_lock(&s_dut_m);
+    *a = s_dut;
+    pthread_mutex_unlock(&s_dut_m);
+    return TRUE;
+}
+/**
+ * @brief at_setDUT - set new DUT1 and PM
+ * @param a (i) - data
+ * @return FALSE if !a or a is wrong
+ */
+int at_setDUT(at_dut_t *a){
+    if(!a) return FALSE;
+    if(a->DUT1 < -1. || a->DUT1 > 1. ||
+       a->px < -1000. || a->px > 1000. ||
+       a->py < -1000. || a->py > 1000.) return FALSE;
+    pthread_mutex_lock(&s_dut_m);
+    s_dut = *a;
+    pthread_mutex_unlock(&s_dut_m);
+    return TRUE;
+}
+
+/**
+ * @brief at_chkstring - check if string is large enough
+ * @param s - string
+ * @param minlen - minimal length (or 0 if not need to check)
+ * @return TRUE if all OK
+ */
+int at_chkstring(at_string_t *s, size_t minlen){
+    if(!s || !s->str) return FALSE;
+    if(s->maxlen < minlen) s->str = realloc(s->str, minlen+1);
+    return TRUE;
+}
+/**
+ * @brief at_newstring
+ * @param maxlen
+ * @return
+ */
+at_string_t *at_newstring(size_t maxlen){
+    at_string_t *s = MALLOC(at_string_t, 1);
+    s->str = MALLOC(char, maxlen+1);
+    s->maxlen = maxlen;
+    return s;
+}
+void at_delstring(at_string_t **s){
+    if(!s || !*s) return;
+    FREE((*s)->str);
+    FREE(*s);
+}
+const char *at_libversion(){
+    const char *v = PACKAGE_VERSION;
+    return v;
+}
+
+/**
+ * @brief at_radtoHdeg - reformat angle in radians to human readable string
+ * @param r - angle
+ * @param s - string
+ * @return
+ */
+int at_radtoHdeg(double r, at_string_t *s){
+#define FMTSTRLEN   13
+    if(!at_chkstring(s, FMTSTRLEN)) return FALSE;
+    int i[4]; char pm;
+    r = eraAnpm(r);
+    eraA2af(2, r, &pm, i);
+    snprintf(s->str, FMTSTRLEN+1, "%c%03d:%02d:%02d.%02d", pm, i[0],i[1],i[2],i[3]);
+    s->strlen = FMTSTRLEN;
+#undef FMTSTRLEN
+    return TRUE;
+}
+/**
+ * @brief at_radtoHtime - reformat time from radians into human readable string
+ * @param r - time / hour angle / etc.
+ * @param s - string
+ * @return
+ */
+int at_radtoHtime(double r, at_string_t *s){
+#define FMTSTRLEN   11
+    if(!at_chkstring(s, FMTSTRLEN)) return FALSE;
+    int i[4]; char pm;
+    r = eraAnp(r);
+    eraA2tf(2, r, &pm, i);
+    snprintf(s->str, FMTSTRLEN+1, "%02d:%02d:%02d.%02d", i[0],i[1],i[2],i[3]);
+    s->strlen = FMTSTRLEN;
+#undef FMTSTRLEN
+    return TRUE;
+}
+
+/**
+ * @brief at_get_MJDt - calculate MJD of `struct timeval` from argument
+ * @param tval (i) - given date (or NULL for current)
+ * @param MJD  (o) - time (or NULL just to check)
+ * @return TRUE if all OK
+ */
+int at_get_MJDt(struct timeval *tval, at_MJD_t *mjd){
+    struct tm tms;
+    double tSeconds;
+    if(!tval){
+        struct timeval currentTime;
+        gettimeofday(&currentTime, NULL);
+        gmtime_r(&currentTime.tv_sec, &tms);
+        tSeconds = tms.tm_sec + ((double)currentTime.tv_usec)/1e6;
+    }else{
+        gmtime_r(&tval->tv_sec, &tms);
+        tSeconds = tms.tm_sec + ((double)tval->tv_usec)/1e6;
+    }
+    int y, m, d;
+    y = 1900 + tms.tm_year;
+    m = tms.tm_mon + 1;
+    d = tms.tm_mday;
+    double utc1, utc2;
+    /* UTC date. */
+    ERFA(eraDtf2d, "UTC", y, m, d, tms.tm_hour, tms.tm_min, tSeconds, &utc1, &utc2);
+    at_MJD_t MJD;
+    MJD.MJD = utc1 - ERFA_DJM0 + utc2;
+    MJD.utc1 = utc1;
+    MJD.utc2 = utc2;
+    ERFA(eraUtctai, utc1, utc2, &MJD.tai1, &MJD.tai2);
+    ERFA(eraTaitt, MJD.tai1, MJD.tai2, &MJD.tt1, &MJD.tt2);
+    if(mjd) *mjd = MJD;
+    return TRUE;
+}
+// calculate by UNIX-time
+int at_get_MJDu(double UNIXtime, at_MJD_t *mjd){
+    struct timeval t;
+    t.tv_sec = (time_t) UNIXtime;
+    t.tv_usec = (suseconds_t) ((UNIXtime-t.tv_sec) * 1e6);
+    return at_get_MJDt(&t, mjd);
+}
+// get full date by JulianDate
+int at_get_MJDj(double JD, at_MJD_t *mjd){
+    int y, m, d, H, M;
+    double fd, utc1, utc2;
+    ERFA(eraJd2cal, JD, 0., &y, &m, &d, &fd);
+    fd *= 24.;
+    H = (int)fd;
+    fd = (fd - H)*60.;
+    M = (int)fd;
+    fd = (fd - M)*60.;
+    ERFA(eraDtf2d, "UTC", y, m, d, H, M, fd, &utc1, &utc2);
+    at_MJD_t MJD;
+    MJD.MJD = utc1 - ERFA_DJM0 + utc2;
+    MJD.utc1 = utc1;
+    MJD.utc2 = utc2;
+    ERFA(eraUtctai, utc1, utc2, &MJD.tai1, &MJD.tai2);
+    ERFA(eraTaitt, MJD.tai1, MJD.tai2, &MJD.tt1, &MJD.tt2);
+    if(mjd) *mjd = MJD;
+    return TRUE;
+}
+
+/**
+ * @brief at_get_LST - calculate local siderial time for current dut and place (change them if need with setters)
+ * @param mjd (i) - date/time for LST (utc1 & tt used)
+ * @param dUT1    - (UT1-UTC)
+ * @param longitude   - site longitude (radians)
+ * @param LST (o) - local sidereal time (radians)
+ * @return lst (radians) or -1 in case of error
+ */
+double at_get_LST(at_MJD_t *mjd){
+    double ut11, ut12;
+    if(eraUtcut1(mjd->utc1, mjd->utc2, s_dut.DUT1, &ut11, &ut12)){
+        WARNX("error in eraUtcut1");
+        return -1.;
+    }
+    double ST = eraGst06a(ut11, ut12, mjd->tt1, mjd->tt2);
+    ST += s_pldata.longitude;
+    if(ST > ERFA_D2PI) ST -= ERFA_D2PI;
+    return ST;
+}
+
+/**
+ * @brief at_hor2eq  - convert horizontal coordinates to polar
+ * @param h (i)   - horizontal coordinates
+ * @param pc (o)  - polar coordinates
+ * @param LST - local sidereal time
+ */
+void at_hor2eq(at_horiz_t *h, at_equat_t *pc, double LST){
+    if(!h || !pc) return;
+    eraAe2hd(h->az, ERFA_DPI/2. - h->zd, s_pldata.latitude, &pc->ha, &pc->dec); // A,H -> HA,DEC; phi - site latitude
+    pc->eo = 0.;
+    if(LST >= 0. && LST < ERFA_D2PI) at_getRA(pc, LST);
+}
+
+/**
+ * @brief at_eq2hor - convert polar coordinates to horizontal
+ * @param pc (i)  - polar coordinates (only HA used)
+ * @param h (o)   - horizontal coordinates
+ * @param sidTime - sidereal time
+ */
+void at_eq2hor(at_equat_t *pc, at_horiz_t *h){
+    if(!h || !pc) return;
+    double alt;
+    eraHd2ae(pc->ha, pc->dec, s_pldata.latitude, &h->az, &alt);
+    h->zd = ERFA_DPI/2. - alt;
+}
+
+/**
+ * @brief at_getRA - get RA from HA and LST (and change pc->ra)
+ * @param pc - polar coordinates
+ * @param LST - local sidereal time
+ * @return right ascension (radians)
+ * WARNING: this function doesn't check arguments (e.g. for 0 < LST < 2pi)
+ */
+double at_getRA(at_equat_t *pc, double LST){
+    double ra = eraAnp(LST - pc->ha + pc->eo);
+    pc->ra = ra;
+    return ra;
+}
+/**
+ * @brief at_getHA - get HA from RA and LST (and change pc->ha)
+ * @param pc - polar coordinates
+ * @param LST - local sidereal time
+ * @return hour angle (radians)
+ * WARNING: this function doesn't check arguments (e.g. for 0 < LST < 2pi)
+ */
+double at_getHA(at_equat_t *pc, double LST){
+    double ha = eraAnpm(LST - pc->ra + pc->eo);
+    pc->ha = ha;
+    return ha;
+}
+
+/**
+ * @brief at_setEffWvl - set effective wavelength for el_get_ObsPlace
+ * @param w - wavelength in um
+ * WITHOUT CHECKING!
+ */
+void at_setEffWvl(double w){
+    s_effwavelength = w;
+}
+
+/**
+ * @brief at_get_ObsPlaceStar - calculate observed place for given star @MJD
+ * @param MJD (i) - date
+ * @param p2000 (i) - catalog coordinates
+ * @param star (i) - star with proper motion etc.
+ * @param pnow (o) - observed place in polar coordinates
+ * @param hnow (o) - observed AZ
+ * @return FALSE if failed
+ */
+int at_get_ObsPlaceStar(at_MJD_t *MJD, at_equat_t *p2000, at_star_t *star, at_equat_t *pnow, at_horiz_t *hnow){
+    if(!MJD || !p2000 || !star) return -1;
+    double aob, zob, hob, dob, rob, eo;
+    /*DBG("p2000->ra=%g, p2000->dec=%g,"
+        "star->pmRA=%g, star->pmDec=%g, star->parallax=%g, star->radvel=%g,"
+        "MJD->utc1=%g, MJD->utc2=%g,"
+        "s_dut.DUT1=%g,"
+        "s_pldata.longitude=%g, s_pldata.latitude=%g, s_pldata.altitude=%g,"
+        "s_dut.px=%g, s_dut.py=%g,"
+        "s_weather.phpa=%g, s_weather.tdegc=%g, s_weather.relhum=%g,"
+        "s_effwavelength=%g", p2000->ra, p2000->dec,
+        star->pmRA, star->pmDec, star->parallax, star->radvel,
+        MJD->utc1, MJD->utc2,
+        s_dut.DUT1,
+        s_pldata.longitude, s_pldata.latitude, s_pldata.altitude,
+        s_dut.px, s_dut.py,
+        s_weather.phpa, s_weather.tdegc, s_weather.relhum,
+        s_effwavelength);*/
+    ERFA(eraAtco13,p2000->ra, p2000->dec,
+                 star->pmRA, star->pmDec, star->parallax, star->radvel,
+                 MJD->utc1, MJD->utc2,
+                 s_dut.DUT1,
+                 s_pldata.longitude, s_pldata.latitude, s_pldata.altitude,
+                 s_dut.px, s_dut.py,
+                 s_weather.phpa, s_weather.tdegc, s_weather.relhum,
+                 s_effwavelength,
+                 &aob, &zob,
+                 &hob, &dob, &rob, &eo);
+    if(pnow){
+        pnow->eo  = eo;
+        pnow->ha  = hob;
+        pnow->ra  = rob;
+        pnow->dec = dob;
+    }
+    if(hnow){
+        hnow->az = aob;
+        hnow->zd = zob;
+    }
+    return TRUE;
+}
+
+/**
+ * @brief at_get_ObsPlace - calculate observed place (without PM etc) for given date
+ * @param tval  (i) - time
+ * @param p2000 (i) - polar coordinates for J2000 (only ra/dec used), ICRS (catalog)
+ * @param pnow  (o) - polar coordinates for given epoch (or NULL)
+ * @param hnow  (o) - horizontal coordinates for given epoch (or NULL)
+ * @return FALSE if failed
+ */
+int at_get_ObsPlace(at_MJD_t *MJD, at_equat_t *p2000, at_equat_t *pnow, at_horiz_t *hnow){
+    at_star_t star = {0};
+    return at_get_ObsPlaceStar(MJD, p2000, &star, pnow, hnow);
+}
+
+/**
+ * @brief
+ * @param
+ */
+/**
+ * @brief at_get_mean - convert apparent coordinates (for MJD) to mean (JD2000)
+ * @param MJD (i) - given date
+ * @param pnow (i) - polar coordinates for given date
+ * @param p2000 (o) - catalog coordinates
+ * @return TRUE if OK
+ */
+int at_get_mean(at_MJD_t *MJD, at_equat_t *pnow, at_equat_t *p2000){
+    if(!MJD || !pnow) return FALSE;
+    double ra, dec, eo, ri;
+    eraAtic13(pnow->ra, pnow->dec, MJD->tt1, MJD->tt2, &ri, &dec, &eo);
+    ra = eraAnp(ri + eo);
+    if(p2000){
+        p2000->ra = ra;
+        p2000->dec = dec;
+        p2000->eo = eo;
+        at_getHA(p2000, 0.);
+    }
+    return TRUE;
+}
+
+/**
+ * @brief at_obs2catE - convert observed place in Ra-Dec coordinates into catalog J2000
+ * @param MJD (i) - epoch for `pnow`
+ * @param pnow (i) - coordinates
+ * @param p2000 (o) - catalog coordinates
+ * @return TRUE if OK
+ */
+int at_obs2catP(at_MJD_t *MJD, at_equat_t *pnow, at_equat_t *p2000){
+    double ra, dec;
+    ERFA(eraAtoc13, "R", pnow->ra, pnow->dec, MJD->utc1, MJD->utc2,
+                    s_dut.DUT1, s_pldata.longitude, s_pldata.latitude, s_pldata.altitude,
+                    s_dut.px, s_dut.py,
+                    s_weather.phpa, s_weather.tdegc, s_weather.relhum,
+                    s_effwavelength,
+                    &ra, &dec);
+    if(p2000){
+        p2000->ra = ra;
+        p2000->dec = dec;
+        p2000->eo = 0.;
+        at_getHA(p2000, 0.);
+    }
+    return TRUE;
+}
+
+/**
+ * @brief at_obs2catAconvert - observed place in A-Z coordinates into catalog J2000
+ * @param MJD (i) - epoch for `hnow`
+ * @param hnow (i) - coordinates
+ * @param p2000 (o) - catalog coordinates
+ * @return TRUE if OK
+ */
+int at_obs2catA(at_MJD_t *MJD, at_horiz_t *hnow, at_equat_t *p2000){
+    double ra, dec;
+    ERFA(eraAtoc13, "A", hnow->az, hnow->zd, MJD->utc1, MJD->utc2,
+                    s_dut.DUT1, s_pldata.longitude, s_pldata.latitude, s_pldata.altitude,
+                    s_dut.px, s_dut.py,
+                    s_weather.phpa, s_weather.tdegc, s_weather.relhum,
+                    s_effwavelength,
+                    &ra, &dec);
+    if(p2000){
+        p2000->ra = ra;
+        p2000->dec = dec;
+        p2000->eo = 0.;
+        at_getHA(p2000, 0.);
+    }
+    return TRUE;
+}
--- a/Auxiliary_utils/libastrotools/examples/CMakeLists.txt
+++ b/Auxiliary_utils/libastrotools/examples/CMakeLists.txt
@ -0,0 +1,9 @@
+project(examples)
+
+# common includes & library
+include_directories(../)
+link_libraries(astrotools usefull_macros erfa)
+
+# exe list
+add_executable(coordstest coordstest.c)
+add_executable(transform transform.c)
--- a/Auxiliary_utils/libastrotools/examples/coordstest.c
+++ b/Auxiliary_utils/libastrotools/examples/coordstest.c
@ -0,0 +1,84 @@
+/*
+ * This file is part of the ERFA project.
+ * Copyright 2025 Edward V. Emelianov <edward.emelianoff@gmail.com>.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <stdio.h>
+#include <time.h>
+#include <usefull_macros.h>
+#include "astrotools.h"
+
+static at_string_t *S = NULL;
+
+static const char *radtohrs(double r){
+    if(!S) S = at_newstring(256);
+    if(!at_radtoHtime(r, S)) ERRX("at_radtoHtime");
+    return S->str;
+}
+static const char *radtodeg(double r){
+    if(!S) S = at_newstring(256);
+    if(!at_radtoHdeg(r, S)) ERRX("at_radtoHdeg");
+    return S->str;
+}
+
+
+int main(){
+    initial_setup();
+    at_MJD_t mjd;
+    if(!at_get_MJDu(time(NULL), &mjd)) ERRX("at_get_MJDu");
+    printf("MJD=%g; TAI=%g/%g, TT=%g/%g, UTC=%g/%g\n", mjd.MJD, mjd.tai1, mjd.tai2, mjd.tt1, mjd.tt2, mjd.utc1, mjd.utc2);
+    double ST = at_get_LST(&mjd);
+    if(ST < 0.) ERRX("at_get_LST");
+    printf("ST = %s\n", radtohrs(ST));
+    at_horiz_t htest = {.az = ERFA_DD2R*91., .zd = ERFA_DPI/4.}; // Z=45degr, A=1degr from south to west
+    printf("hzd=%g\n", htest.zd);
+    at_equat_t ptest;
+    at_hor2eq(&htest, &ptest, ST);
+    printf("A=%s, ", radtodeg(htest.az));
+    printf("Z=%s; ", radtodeg(htest.zd));
+    printf("HOR->EQ: HA=%s, ", radtohrs(ptest.ha));
+    printf("RA=%s, ", radtohrs(ptest.ra));
+    printf("DEC=%s\n", radtodeg(ptest.dec));
+    at_horiz_t h2;
+    at_eq2hor(&ptest, &h2);
+    printf("Back conversion EQ->HOR: A=%s, ", radtodeg(h2.az));
+    printf("Z=%s\n", radtodeg(h2.zd));
+    at_equat_t pnow;
+    if(!at_get_ObsPlace(&mjd, &ptest, &pnow, &h2)) ERRX("at_get_ObsPlace");
+    printf("\nApparent place, RA=%s, ", radtohrs(pnow.ra-pnow.eo));
+    printf("HA=%s, ", radtohrs(pnow.ha));
+    printf("ST-RA=%s, ", radtohrs(ST-pnow.ra+pnow.eo));
+    printf("DEC=%s; ", radtodeg(pnow.dec));
+    printf("A=%s, ", radtodeg(h2.az));
+    printf("Z=%s\n", radtodeg(h2.zd));
+    at_hor2eq(&h2, &ptest, ST);
+    printf("\tHOR->EQ: RA=%s, ", radtohrs(ptest.ra-ptest.eo));
+    printf("HA=%s, ", radtohrs(ptest.ha));
+    printf("ST-RA=%s, ", radtohrs(ST-ptest.ra+ptest.eo));
+    printf("DEC=%s\n", radtodeg(ptest.dec));
+    at_eq2hor(&pnow, &h2);
+    printf("\tEQ->HOR: A=%s, ", radtodeg(h2.az));
+    printf("Z=%s\n", radtodeg(h2.zd));
+    if(!at_get_mean(&mjd, &pnow, &ptest)) ERRX("at_get_mean");
+    printf("\nBack conversion pnow to mean place, ");
+    printf("RA=%s, ", radtohrs(ptest.ra));
+    printf("Dec=%s\n", radtodeg(ptest.dec));
+    if(!at_obs2catP(&mjd, &pnow, &ptest)) ERRX("at_obs2catP");
+    printf("And back to J2000 by observed pnow: ");
+    printf("RA=%s, ", radtohrs(ptest.ra));
+    printf("Dec=%s\n", radtodeg(ptest.dec));
+    return 0;
+}
--- a/Auxiliary_utils/libastrotools/examples/transform.c
+++ b/Auxiliary_utils/libastrotools/examples/transform.c
@ -0,0 +1,135 @@
+/*
+ * This file is part of the astrotools project.
+ * Copyright 2025 Edward V. Emelianov <edward.emelianoff@gmail.com>.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <stdio.h>
+#include <usefull_macros.h>
+#include "astrotools.h"
+
+// convert coordinates from given epoch to J2000
+
+typedef struct{
+    int help;
+    int obsplace;
+    double ra;
+    double dec;
+    double JD;
+    double unixtime;
+    double longitude;
+    double latitude;
+    double altitude;
+    double relhum;
+    double phpa;
+    double tdegc;
+    double DUT1;
+    double px;
+    double py;
+} parameters;
+
+static parameters G = {
+    .ra = -100.,
+    .dec = -100.,
+    .JD = -1.,
+    .unixtime = -1.,
+    .longitude = -1000.,
+    .latitude = -1000.,
+    .altitude = -1000.,
+    .relhum = -1.,
+    .phpa = -1.,
+    .tdegc = -300.,
+    .DUT1 = -100.,
+    .px = -10000.,
+    .py = -10000.
+};
+
+static myoption cmdlnopts[] = {
+    {"help",        NO_ARGS,    NULL,   'h',    arg_int,    APTR(&G.help),      "show this help"},
+    {"obsplace",    NO_ARGS,    NULL,   'O',    arg_int,    APTR(&G.obsplace),  "input RA/Dec is observed place"},
+    {"JD",          NEED_ARG,   NULL,   'J',    arg_double, APTR(&G.JD),        "Julian date"},
+    {"unixtime",    NEED_ARG,   NULL,   'u',    arg_double, APTR(&G.unixtime),  "UNIX-time (seconds)"},
+    {"ra",          NEED_ARG,   NULL,   'R',    arg_double, APTR(&G.ra),        "Right Ascention for given date (degrees)"},
+    {"dec",         NEED_ARG,   NULL,   'D',    arg_double, APTR(&G.dec),       "Declination for given date (degrees)"},
+    {"longitude",   NEED_ARG,   NULL,   'o',    arg_double, APTR(&G.longitude), "site longitude (degr)"},
+    {"latitude",    NEED_ARG,   NULL,   'l',    arg_double, APTR(&G.latitude),  "site latitude (degr)"},
+    {"altitude",    NEED_ARG,   NULL,   'a',    arg_double, APTR(&G.altitude),  "site altitude (meters)"},
+    {"relhum",      NEED_ARG,   NULL,   'H',    arg_double, APTR(&G.relhum),    "relative humidity (0..1)"},
+    {"phpa",        NEED_ARG,   NULL,   'P',    arg_double, APTR(&G.phpa),      "atm. pressure (hPa)"},
+    {"tdegc",       NEED_ARG,   NULL,   'T',    arg_double, APTR(&G.tdegc),     "ambient temperature (degC)"},
+    {"DUT1",        NEED_ARG,   NULL,   'd',    arg_double, APTR(&G.DUT1),      "DUT1 (seconds)"},
+    {"px",          NEED_ARG,   NULL,   'x',    arg_double, APTR(&G.px),        "polar X (m)"},
+    {"py",          NEED_ARG,   NULL,   'y',    arg_double, APTR(&G.py),        "polar Y (m)"},
+    end_option
+};
+
+
+int main(int argc, char **argv){
+    initial_setup();
+    parseargs(&argc, &argv, cmdlnopts);
+    if(G.help) showhelp(-1, cmdlnopts);
+    at_MJD_t MJD;
+    G.ra *= ERFA_DD2R;
+    G.dec *= ERFA_DD2R;
+    if(G.ra < 0. || G.ra > ERFA_D2PI || G.dec < -ERFA_DPI/2. || G.dec > ERFA_DPI/2.)
+        ERRX("Need RA (0..360 degr) and Dec (-90..90 degr)");
+    if(G.JD < 0. && G.unixtime < 0.)
+        ERRX("Need JD or unixtime");
+    at_place_t place;
+    at_getPlace(&place);
+    at_weather_t weather;
+    at_getWeath(&weather);
+    at_dut_t dut;
+    at_getDUT(&dut);
+    G.longitude *= ERFA_DD2R;
+    G.latitude *= ERFA_DD2R;
+    if(G.longitude >= -ERFA_DPI && G.longitude <= ERFA_DPI) place.longitude = G.longitude;
+    if(G.latitude >= -ERFA_DPI/2 && G.latitude <= ERFA_DPI/2) place.latitude = G.latitude;
+    if(G.altitude > -100. && G.altitude < 12000.) place.altitude = G.altitude;
+    if(G.relhum >= 0. && G.relhum <= 1.) weather.relhum = G.relhum;
+    if(G.phpa >= 0. && G.phpa <= 1300.) weather.phpa = G.phpa;
+    if(G.tdegc > -273.15 && G.tdegc < 100.) weather.tdegc = G.tdegc;
+    if(G.DUT1 > -1. && G.DUT1 < 1.) dut.DUT1 = G.DUT1;
+    if(G.px > -1000. && G.px < 1000.) dut.px = G.px;
+    if(G.py > -1000. && G.py < 1000.) dut.py = G.py;
+    at_setPlace(&place);
+    DBG("Place: long=%g, lat=%g, alt=%g",
+        place.longitude*ERFA_DR2D, place.latitude*ERFA_DR2D, place.altitude);
+    at_setWeath(&weather);
+    DBG("Weather: P=%g hPa, rho=%g%%, T=%g degrC",
+        weather.phpa, weather.relhum*100., weather.tdegc);
+    at_setDUT(&dut);
+    DBG("DUT1=%g, px=%g, py=%g", dut.DUT1, dut.px, dut.py);
+    if(G.JD > 0. && !at_get_MJDj(G.JD, &MJD)) ERRX("Bad julian date");
+    if(G.unixtime > 0. && !at_get_MJDu(G.unixtime, &MJD)) ERRX("Bad UNIX time");
+    DBG("Julian: MJD=%g, TT=%.2f+%g", MJD.MJD, MJD.tt1, MJD.tt2);
+    at_equat_t p2000, pnow = {.ra = G.ra, .dec = G.dec, .eo = 0.};
+    at_getHA(&pnow, at_get_LST(&MJD));
+    DBG("in: ra=%.10f, dec=%.10f, ha=%.10f", pnow.ra*ERFA_DR2D, pnow.dec*ERFA_DR2D, pnow.ha*ERFA_DR2D);
+    if(G.obsplace){ // ra/dec is observed place
+        if(!at_obs2catP(&MJD, &pnow, &p2000)) ERRX("at_obs2catP");
+        DBG("Observed");
+    }else{ // ra/dec is catalog for given epoch
+        if(!at_get_mean(&MJD, &pnow, &p2000)) ERRX("at_get_mean");
+        DBG("Catalog");
+    }
+    at_string_t *s = at_newstring(128);
+    at_radtoHtime(p2000.ra, s);
+    printf("RA(h:m:s)=%s, ", s->str);
+    at_radtoHdeg(p2000.dec, s);
+    printf("Dec(d:m:s)=%s\n", s->str);
+    printf("RA(degr)=%g, Dec(degr)=%g\n", p2000.ra*ERFA_DR2D, p2000.dec*ERFA_DR2D);
+    return 0;
+}