[Isocops] IBEX Orbit #443 ATS Approval ( 07 - 16 April) - v001 approval

KEN FAIRCHILD fair-play at comcast.net
Wed Mar 27 14:25:11 EDT 2019


All,


I have looked at the orbit 443 ATS,


IBEX_2019_097_o0443a_v001.scr,


and I approve.


The only constraint violations in


IBEX_2019_097_o0443a_v001.ccvr


are from the removal of the


ACT_SetSpinPulseProtectEnable Enable


commands (2); the violations are expected.


The PL commands in the v001 ATS match those in the v002 STF,


IBEX_2019_097_o0443a_v002.stf.


Ascending and descending command sequences are consistent with each other, 15 Re ascending, the apogee maneuver time and 15 Re descending as determined from the OEF,


IBEX_2019_097_o0443a_v001.oef,


and as verified with ibex_orbit.


There are no star tracker outages.


The ground station command sequences are correct and the timing and bit rates match those in the contacts file,


IBEX_Orbit443_Contacts.txt,


for all contacts (4).


We are not doing battery cell balancing this orbit; we'll do it again in the next orbit.


The inertial maneuver at perigee of orbit 442 left us pointing in safe directions for the orbit 443 arc A ascending and descending sequences:


ibex_rotate -o -u 0.968203,0.232981,0.091119 -w ibex-sun -t 2019/04:07:12:32:24

Quaternion +0.000000,+0.000000,+0.000000,+0.000000

points axis +1.000000,+0.000000,+0.000000

towards ECI +0.968203,+0.232981,+0.091119

which is R.A. +13.530 Decl. +5.228

missing R.A. +15.792 Decl. +6.708 (ibex-sun)

error is R.A. +2.262 Decl. +1.480

for a total 2.693 deg


ibex_rotate -o -u 0.968203,0.232981,0.091119 -w ibex-sun -t 2019/04:11:07:46:48

Quaternion +0.000000,+0.000000,+0.000000,+0.000000

points axis +1.000000,+0.000000,+0.000000

towards ECI +0.968203,+0.232981,+0.091119

which is R.A. +13.530 Decl. +5.228

missing R.A. +19.397 Decl. +8.184 (ibex-sun)

error is R.A. +5.867 Decl. +2.957

for a total 6.534 deg


The inertial maneuver at apogee leaves us pointing in safe directions at the time of the maneuver and for arc B ascending and descending sequences:


ibex_rotate -o -u 0.945101,0.30373,0.120553 -w ibex-sun -t 2019/04:11:09:29:56

Quaternion +0.000000,+0.000000,+0.000000,+0.000000

points axis +1.000000,+0.000000,+0.000000

towards ECI +0.945101,+0.303730,+0.120553

which is R.A. +17.816 Decl. +6.924

missing R.A. +19.463 Decl. +8.212 (ibex-sun)

error is R.A. +1.647 Decl. +1.288

for a total 2.080 deg


ibex_rotate -o -u 0.945101,0.30373,0.120553 -w ibex-sun -t 2019/04:11:11:05:02

Quaternion +0.000000,+0.000000,+0.000000,+0.000000

points axis +1.000000,+0.000000,+0.000000

towards ECI +0.945101,+0.303730,+0.120553

which is R.A. +17.816 Decl. +6.924

missing R.A. +19.524 Decl. +8.238 (ibex-sun)

error is R.A. +1.708 Decl. +1.314

for a total 2.143 deg


ibex_rotate -o -u 0.945101,0.30373,0.120553 -w ibex-sun -t 2019/04:16:01:42:21

Quaternion +0.000000,+0.000000,+0.000000,+0.000000

points axis +1.000000,+0.000000,+0.000000

towards ECI +0.945101,+0.303730,+0.120553

which is R.A. +17.816 Decl. +6.924

missing R.A. +23.646 Decl. +9.884 (ibex-sun)

error is R.A. +5.830 Decl. +2.960

for a total 6.482 deg


The inertial maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 444 apogee:


ibex_rotate -o -u 0.915887,0.371828,0.151313 -w ibex-sun -t 2019/04:16:05:06:06

Quaternion +0.000000,+0.000000,+0.000000,+0.000000

points axis +1.000000,+0.000000,+0.000000

towards ECI +0.915887,+0.371828,+0.151313

which is R.A. +22.096 Decl. +8.703

missing R.A. +23.773 Decl. +9.926 (ibex-sun)

error is R.A. +1.677 Decl. +1.223

for a total 2.058 deg


ibex_rotate -o -u 0.915887,0.371828,0.151313 -w ibex-sun -t 2019-04-21T00:57:05.378Z

Quaternion +0.000000,+0.000000,+0.000000,+0.000000

points axis +1.000000,+0.000000,+0.000000

towards ECI +0.915887,+0.371828,+0.151313

which is R.A. +22.096 Decl. +8.703

missing R.A. +28.386 Decl. +11.645 (ibex-sun)

error is R.A. +6.290 Decl. +2.942

for a total 6.854 deg


No Lo O-mode.


There is no overlap with orbit 442 commands by manual inspection or by checking at


http://ibex.unh.edu/cgi-bin/ats.cgi.


Command Approval Checklist is attached.


Ken

> On March 25, 2019 at 3:05 PM "Perry, Timothy" <Timothy.Perry at ngc.com> wrote:
> 
> 
>     All,
> 
>        Attached are the planning files for Orbit #443.
> 
>     Please respond to this thread with comments and approvals.
> 
>     Approvals are required by COB 27 March 2019.
> 
>      
> 
>     Please note the following:
> 
>     1.       No Battery Balancing this orbit
> 
>      
> 
>     2.       IBEX_2019_097_o0443_v001.ccvr
> 
>         # Input files:         1
> 
>         #   IBEX_2019_097_o0443a_v001.scr
> 
>          
> 
>         ==========================
> 
>         HARD CONSTRAINT VIOLATIONS
> 
>         ==========================
> 
>         NO VIOLATIONS.
> 
>          
> 
>         ==========================
> 
>         SOFT CONSTRAINT VIOLATIONS
> 
>         ==========================
> 
>         IBX-CLC-016: No command to enable spin pulse protection was found after
> 
>                      transition to science mode at 2019/04/07 09:46:53 UTC
> 
>         IBX-CLC-016: No command to enable spin pulse protection was found after
> 
>                      transition to science mode at 2019/04/11 10:35:02 UTC
> 
>          
> 
>         ==============
> 
>         OTHER MESSAGES
> 
>         ==============
> 
>         NO MESSAGES.
> 
>      
> 
>     Timothy E.Perry
> 
>     CRS IBEX OCO-2
> 
>     Mission Operations
> 
>     tim.perry at orbitalatk.com
> 
>     Office (703) 406-5976
> 
>     Cell (301) 606-1430
> 
>     [cid:image001.jpg at 01D04F4E.6B1BECE0]
> 
>      
> 
>      
> 
> 
> 
>     ---------------------------------------------
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>     *********************
> 


 
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