thermocalc
Active member
Hi to all in the forum,
I arrived to day 6 and 7 of Apollo 9 and I am not sure what I am doing wrong even after reading the real flight plan and related docs, so I posted here.
day 6) S095
when I got the MCC S065 update the 1st time I got this PAD:
so what I did:
V49E to get into the attitude 000.45-294.31-359.96 (1st column PAD), follow the checklist to set up the ORB RATE using the DAP, hitting the "E" of the "70000(E)" at time 123:56:45 (1st column PAD) to start the orbital rate (by checking Orbiter HUD I saw that I was flying LVLH); I was expecting/thinking to reach 0-0-0 attitude (2nd column) at 124:01:45 (2nd column) but I was only at P=315 but still in LVLH, as far as I understood (my interpretation of the PADs) at time 124:01:45 + 5 min = 124:06:45 the camera should have shot 25 exposures with a duration of 6 s each - so i wait for 124:06:45 expecting to reach 0-0-0 attitude at that time, but I was only at P=330 ... so I am confused.
In summary here what I understood should happen reading the PAD:
at 123:56:45 I should be at 000.45-294.31-359.96 to start ORB RATE, I should reach 000.00-000.00-000.00 5 min after, i.e. 124:01:00, at that time I should keep that attitude stopping ORB RATE hitting HOLD, the camera will do 25 photos of 6 s each, at time 124:06:15 and still holding the 0-0-0 attitude the camera should shot others 3 photos of 6 sec each. Am I correct with the interpretation of the PADs?
The second MCC S065 update was different:
as before, I made V49E to reach 000.48-332.61-359.95 and at 125:34:37 I started the ORB RATE (I was LVLH according Orbiter HUD), again I as expecting to reach 0-0-0 5min later at 125:39:37 but I was at P=352 not P=0.
moreover, in the check list it is written to "stop ORB Rate" but when? at which time?
what I am doing wrong?
thanks, Paolo.
I arrived to day 6 and 7 of Apollo 9 and I am not sure what I am doing wrong even after reading the real flight plan and related docs, so I posted here.
day 6) S095
when I got the MCC S065 update the 1st time I got this PAD:
so what I did:
V49E to get into the attitude 000.45-294.31-359.96 (1st column PAD), follow the checklist to set up the ORB RATE using the DAP, hitting the "E" of the "70000(E)" at time 123:56:45 (1st column PAD) to start the orbital rate (by checking Orbiter HUD I saw that I was flying LVLH); I was expecting/thinking to reach 0-0-0 attitude (2nd column) at 124:01:45 (2nd column) but I was only at P=315 but still in LVLH, as far as I understood (my interpretation of the PADs) at time 124:01:45 + 5 min = 124:06:45 the camera should have shot 25 exposures with a duration of 6 s each - so i wait for 124:06:45 expecting to reach 0-0-0 attitude at that time, but I was only at P=330 ... so I am confused.
In summary here what I understood should happen reading the PAD:
at 123:56:45 I should be at 000.45-294.31-359.96 to start ORB RATE, I should reach 000.00-000.00-000.00 5 min after, i.e. 124:01:00, at that time I should keep that attitude stopping ORB RATE hitting HOLD, the camera will do 25 photos of 6 s each, at time 124:06:15 and still holding the 0-0-0 attitude the camera should shot others 3 photos of 6 sec each. Am I correct with the interpretation of the PADs?
The second MCC S065 update was different:
as before, I made V49E to reach 000.48-332.61-359.95 and at 125:34:37 I started the ORB RATE (I was LVLH according Orbiter HUD), again I as expecting to reach 0-0-0 5min later at 125:39:37 but I was at P=352 not P=0.
moreover, in the check list it is written to "stop ORB Rate" but when? at which time?
what I am doing wrong?
thanks, Paolo.