make_on_surface() to leave humidity undefined to maintain ABI compati…

…bility with 1.0

include/novas.h

@@ -815,6 +815,7 @@ typedef struct {
  * refraction model is employed.
  *
  * @sa observer
+ * @sa make_on_surface()
  */
 typedef struct {
   double latitude;      ///< [deg] geodetic (ITRS) latitude; north positive
@@ -830,6 +831,7 @@ typedef struct {
  *
  * @sa observer
  * @sa IN_SPACE_INIT
+ * @sa make_in_space()
  */
 typedef struct {
   double sc_pos[3];     ///< [km] geocentric (or [AU] ICRS barycentric) position vector (x, y, z)
@@ -846,6 +848,11 @@ typedef struct {
 /**
  * Observer location.
  *
+ * @sa make_observer()
+ * @sa make_observer_at_geocenter()
+ * @sa make_observer_on_earth()
+ * @sa make_observer_in_space()
+ * @sa make_solar_system_observer()
  */
 typedef struct {
   enum novas_observer_place where;    ///< observer location type

src/novas.c

@@ -6840,6 +6840,7 @@ int make_planet(enum novas_planet num, object *planet) {
  * @sa make_observer_at_geocenter()
  * @sa make_observer_on_surface()
  * @sa make_observer_in_space()
+ * @sa make_solar_system_observer()
  */
 short make_observer(enum novas_observer_place where, const on_surface *loc_surface, const in_space *loc_space, observer *obs) {
   static const char *fn = "make_observer";
@@ -6956,9 +6957,9 @@ int make_observer_in_space(const double *sc_pos, const double *sc_vel, observer
  * the given parameters.
  *
  * Note, that because this is an original NOVAS C routine, it does not have an argument to set
- * a humidity value (e.g. for radio refraction). As such the call will set humidity to 0.0.
- * To set the humidity, set the output structure's field after calling this funcion. Its unit
- * is [%], and so the range is 0.0--100.0.
+ * a humidity value (e.g. for radio refraction). As such, the humidity value remains undefined
+ * after this call. To set the humidity, set the output structure's field after calling this
+ * funcion. Its unit is [%], and so the range is 0.0--100.0.
  *
  * @param latitude      [deg] Geodetic (ITRS) latitude in degrees; north positive.
  * @param longitude     [deg] Geodetic (ITRS) longitude in degrees; east positive.
@@ -6981,7 +6982,9 @@ int make_on_surface(double latitude, double longitude, double height, double tem
   loc->height = height;
   loc->temperature = temperature;
   loc->pressure = pressure;
-  loc->humidity = 0.0;
+
+  // FIXME starting v2.0 set humidity to 0.0
+  //loc->humidity = 0.0;
 
   return 0;
 }