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Results tagged with telemetry
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user 3075
Questions related to the stream of data, typically transmitted via radio, generated by spacecraft or space missions.
12
votes
1
answer
553
views
What did "verb 50 - noun 90" mean during Apollo 11 powered descent? (1202 alarm)
During powered descent a 1202 alarm occurred when LM Pilot Buzz Aldrin asked the Apollo Guidance Computer (AGC) for the difference between computed and measured altitude above ground by typing V16N68 …
- 3,043
4
votes
What did "verb 50 - noun 90" mean during Apollo 11 powered descent? (1202 alarm)
Apparently the answer is "They don't mean anything, it's a telemetry bug". … astronauts typed single-digit verbs and nouns as two digits (0 followed by digit); in this specific case, probably due to hurry caused by alarm, they just typed the "short version", which resulted in the telemetry …
- 3,043
0
votes
Tracking OSIRIS-REX
I set up a page for visual tracking any space probe using NASA Horizons data:
http://win98.altervista.org/space/exploration/3d/space-explorer-tracker.html?orbiter=-37&body=@399
It is not yet finished, …
- 3,043
0
votes
Tracking OSIRIS-REX
Found realtime telemetries for Osisir Rex "obtained by interpolating the most up-to-date NAIF's files":
http://cristianopi.altervista.org/as/sonde_orx/a_temporea.html
Related resources:
http://cristia …
- 3,043
2
votes
4
answers
254
views
Tracking OSIRIS-REX
Where could I get real time telemetries for OSIRIS-REX? On official site I can only find "graphical simulated future telemetries", which are not very useful, also because each AAM is stated to occur e …
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3
votes
Accepted
Tracking OSIRIS-REX
Found the solution thanks to uhoh.
Use this URL to request Osiris-Rex ephemeris from NASA Horizons site, which corresponds to this batch command:
COMMAND='ORX'
MAKE_EPHEM='YES'
TABLE_TYPE='OBSERVER' …
- 3,043
3
votes
0
answers
158
views
How to "decode" this ancient log of Apollo Guidance Computer (AGC)?
I found this interesting document:
https://www.ibiblio.org/apollo/Documents/apollo_11_computer_words.pdf
But the scan quality is very very poor!
I tried interpreting the headers, but some character …
- 3,043
2
votes
2
answers
212
views
How to calculate velocity components of a point on Mars surface w.r.t. Mars center?
I found altitude, speed and acceleration data of old mission Phoenix during EDL phase, but they are referred to Mars c.o.g. rather than to ground or to landing site:
Position and velocity (X_POSIT …
- 3,043
3
votes
How to calculate velocity components of a point on Mars surface w.r.t. Mars center?
I just realized that rather than x/y/z data I can just use latitude, longitude and distance from center both for calculating position and speed w.r.t. surface and landing site, by subtracting from the …
- 3,043
1
vote
How can I know if NASA Horizons output is measured, calculated, estimated or what-else?
Partial answer to the last part of the question:
How can I know when it was last updated and on which basis?
Compare the "revision date" in output header to the "Start (TDB)" date of last item i …
- 3,043
4
votes
2
answers
191
views
How can I know if NASA Horizons output is measured, calculated, estimated or what-else?
Is it an onboard telemetry?
Is it calculated by the time the light takes to go from Earth to S/C and back?
How can I know whent it was last updated and on which basis? …
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