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cxx/mcc_mount_telemetry.h

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+#pragma once
+
+/*  MOUNT CONTROL COMPONENTS LIBRARY  */
+
+
+/*  MOUNT TELEMETRY OBJECT CONCEPT AND DEFAULT IMPLEMENTATION  */
+
+#include <chrono>
+
+namespace mcc
+{
+
+
+namespace traits
+{
+
+template <typename T>
+concept mcc_mount_telemetry_c = requires(T t) {
+    typename T::mount_telemetry_data_t;
+    { t.update() } -> std::same_as<typename T::mount_telemetry_data_t>;
+};
+
+}  // namespace traits
+
+
+class MccMountTelemetry
+{
+public:
+    // mount current telemetry data: time, position and related quantities
+    struct mount_telemetry_data_t {
+        typedef double mnt_coord_t;
+        typedef double mnt_speed_t;
+        typedef double time_point_t;
+
+        // time-related
+        std::chrono::system_clock::time_point utc;
+        time_point_t mjd;  // modified Julian date
+        time_point_t ut1;
+        time_point_t tt;
+        time_point_t siderTime;  // sideral time (in radians)
+
+        // apparent target (user-input) current coordinates (in radians)
+        mnt_coord_t tagRA, tagDEC;
+        mnt_coord_t tagHA;
+        mnt_coord_t tagAZ, tagZD;
+        mnt_coord_t tagPA;  // paralactic angle
+
+        // encoder-measured current mount coordinates (in radians)
+        mnt_coord_t mntRA, mntDEC;
+        mnt_coord_t mntHA;
+        mnt_coord_t mntAZ, mntZD;
+        mnt_coord_t mntPA;
+
+        // encoder-measured (non-corrected for PCS) current mount position and moving speed (in radians, radians/s)
+        // X - HA, Y - DEC for equatorial-type mount; X - AZ, Y - ZD for horizontal-type one
+        mnt_coord_t mntPosX, mntPosY;
+        mnt_speed_t mntSpeedX, mntSpeedY;
+
+        // current refraction coefficient (for tagZD)
+        mnt_coord_t currRefr;
+
+        // PCS (pointing correction system) corrections
+        // X - HA, Y - DEC for equatorial-type mount; X - AZ, Y - ZD for horizontal-type one
+        mnt_coord_t pcsX, pcsY;
+    };
+
+    mount_telemetry_data_t update()
+    {
+        return _data;
+    }
+
+protected:
+    mount_telemetry_data_t _data;
+};
+
+}  // namespace mcc