Add EGM96 datum conversion

interuss · Nov 14, 2023 · 9d3e43f · 9d3e43f
1 parent 3b16511
commit 9d3e43f
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diff --git a/monitoring/mock_uss/riddp/routes_observation.py b/monitoring/mock_uss/riddp/routes_observation.py
@@ -24,6 +24,7 @@
 from .config import KEY_RID_VERSION
 from .database import db
 from monitoring.monitorlib.formatting import limit_resolution
+from monitoring.monitorlib.geo import egm96_geoid_offset
 
 
 def _make_flight_observation(
@@ -61,6 +62,8 @@ def _make_flight_observation(
         paths.append(current_path)
 
     p = flight.most_recent_position
+    msl_alt = p.alt - egm96_geoid_offset(s2sphere.LatLng.from_degrees(p.lat, p.lng))
+    # TODO: Return msl_alt in observation information
     current_state = observation_api.CurrentState(
         timestamp=p.time.isoformat(),
         operational_status=flight.operational_status,

diff --git a/monitoring/monitorlib/assets/README.md b/monitoring/monitorlib/assets/README.md
@@ -0,0 +1,9 @@
+# monitorlib assets
+
+This folder contains non-code artifacts used by monitorlib.
+
+## WW15MGH.DAC
+
+EGM96 geoid offsets from WGS84 ellipsoid in binary 15-minute grid format.
+
+Previously hosted at: http://earth-info.nga.mil/GandG/wgs84/gravitymod/egm96/binary/WW15MGH.DAC