what is ellipsoidal height in the local origin?

Hello, in the example of ecef2enu, the local origin of a satellite should be entered. What is the ellipsoidal height in the local origin? Height of a satellite from the Earth surface? Or any arbitrary point? Can I use the satellite position at a given time as the local origin to claculate debris coordinates within the frame of the sensor onboard of the satellite using your example?

Answer 1

[Divyajyoti Nayak]

Hi @vasili,

Ellipsoidal height is the height measured from the reference of ellipsoid approximation of the earth's surface and not the actual surface of the earth.

For your second question, yes since the sensor is on the satellite, it is considered the local origin and taking its position at a given time the coordinates of the debris can be calculated for that given time.