Hi all,

I have looked at the orbit 0665 ATS file, IBEX_2024_290_o0665a_v001.scr and I approve.

 

The constraint violations in IBEX_2024_290_0665_v001.ccvr are from the removal of the ACT_SetSpinPulseProtectEnable Enable commands and the battery charge dropping during the Eclipse. The violations are acceptable.

 

The PL commands in IBEX_2024_290_o0665a_v001.scr match those in the STF, IBEX_2024_290_o0665a_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_2024_290_o0665a_v001.oef and as verified with ibex_orbit.

 

There is 1 star tracker outage this orbit. Outage begins at 2024-10-16 14:40:04 and lasts for 85.4 hours. 

  

The ground station command sequences are correct and the timing and bit rates match those in the contacts file, IBEX_Orbit665_Contacts.txt for all contacts (3).

 

Eclipse flag is set on 1.5 hours before the eclipse begins at 2024-10-25 12:13:01. Eclipse flag is set off 14.6 mins after the eclipse ends at 2024-10-25 13:22:24. These values match the eclipse planning.

 

The Sun maneuver at perigee of orbit 0664 left us pointing in safe directions for the orbit 0665 arc A ascending and descending sequences:

 

ibex_rotate -o -r +200.840 -d -8.751 -w ibex-sun -t 2024/10:15:18:22:28

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

points axis  +1.000000,+0.000000,+0.000000

towards ECI  -0.923698,-0.351618,-0.152141

which is     R.A. +200.840 Decl.  -8.751

missing      R.A. +200.840 Decl.  -8.751 (ibex-sun)

error is     R.A.   +0.000 Decl.  +0.000

for a total  0.000 deg

 

ibex_rotate -o -r +200.840 -d -8.751 -w ibex-sun -t 2024/10:16:16:02:06

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

points axis  +1.000000,+0.000000,+0.000000

towards ECI  -0.923698,-0.351618,-0.152141

which is     R.A. +200.840 Decl.  -8.751

missing      R.A. +201.715 Decl.  -9.131 (ibex-sun)

error is     R.A.   +0.875 Decl.  +0.380

for a total  0.944 deg

 

ibex_rotate -o -r +200.840 -d -8.751 -w ibex-sun -t 2024/10:20:10:21:47

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

points axis  +1.000000,+0.000000,+0.000000

towards ECI  -0.923698,-0.351618,-0.152141

which is     R.A. +200.840 Decl.  -8.751

missing      R.A. +205.185 Decl. -10.432 (ibex-sun)

error is     R.A.   +4.345 Decl.  +1.681

for a total  4.602 deg

 

 

The Inertial precession 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 -0.904295,-0.387731,-0.178648 -w ibex-sun -t 2024/10:20:12:04:55

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

points axis  +1.000000,+0.000000,+0.000000

towards ECI  -0.904295,-0.387731,-0.178648

which is     R.A. +203.208 Decl. -10.291

missing      R.A. +205.252 Decl. -10.456 (ibex-sun)

error is     R.A.   +2.044 Decl.  +0.165

for a total  2.017 deg

 

ibex_rotate -o -u -0.904295,-0.387731,-0.178648 -w ibex-sun -t 2024/10:20:13:40:01

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

points axis  +1.000000,+0.000000,+0.000000

towards ECI  -0.904295,-0.387731,-0.178648

which is     R.A. +203.208 Decl. -10.291

missing      R.A. +205.313 Decl. -10.479 (ibex-sun)

error is     R.A.   +2.105 Decl.  +0.188

for a total  2.079 deg

 

ibex_rotate -o -u -0.904295,-0.387731,-0.178648 -w ibex-sun -t 2024/10:25:03:26:48

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

points axis  +1.000000,+0.000000,+0.000000

towards ECI  -0.904295,-0.387731,-0.178648

which is     R.A. +203.208 Decl. -10.291

missing      R.A. +209.677 Decl. -12.095 (ibex-sun)

error is     R.A.   +6.469 Decl.  +1.803

for a total  6.597 deg

 

The Inertial precession maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 0666 apogee:

 

ibex_rotate -o -u -0.866903,-0.453726,-0.206426 -w ibex-sun -t 2024/10:25:05:26:55

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

points axis  +1.000000,+0.000000,+0.000000

towards ECI  -0.866903,-0.453726,-0.206426

which is     R.A. +207.627 Decl. -11.913

missing      R.A. +209.761 Decl. -12.128 (ibex-sun)

error is     R.A.   +2.134 Decl.  +0.215

for a total  2.098 deg

 

ibex_rotate -o -u -0.866903,-0.453726,-0.206426 -w ibex-sun -t 2024-10-30T07:20:15

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

points axis  +1.000000,+0.000000,+0.000000

towards ECI  -0.866903,-0.453726,-0.206426

which is     R.A. +207.627 Decl. -11.913

missing      R.A. +214.650 Decl. -13.820 (ibex-sun)

error is     R.A.   +7.024 Decl.  +1.907

for a total  7.107 deg

 

There is no overlap with orbit 0664 commands.

 

Command Approval Checklist is attached.

  

Carol

 

-- 

Carol Weaver

University of New Hampshire

503-902-8492

 

From: Perry, Timothy E [US] (SP) <Timothy.Perry@ngc.com>
Date: Wednesday, October 2, 2024 at 16:34
To: Carol Weaver <carol.weaver@unh.edu>, Chubin, Eric [US] (SP) <Eric.Chubin@ngc.com>, Coca Gonzales, Andrea [US] (SP) <Andrea.CocaGonzales@ngc.com>, David Heirtzler <David.Heirtzler@unh.edu>, ADS-IBEX@l3harris.com <ADS-IBEX@l3harris.com>, IBEXOPS@gmail.com <IBEXOPS@gmail.com>, isocops@lists.sr.unh.edu <isocops@lists.sr.unh.edu>, kwfairchild@gmail.com <kwfairchild@gmail.com>, Kenneth Fairchild <Ken.Fairchild@unh.edu>, angoldconsulting@earthlink.net <angoldconsulting@earthlink.net>, Paul.Janzen@mso.umt.edu <Paul.Janzen@mso.umt.edu>, Perry, Timothy E [US] (SP) <Timothy.Perry@ngc.com>, Tyler, Ryan S [US] (SP) <Ryan.Tyler@ngc.com>, Wesley, Sheral R [US] (SP) <Sheral.Wesley@ngc.com>, Wynn, Reese [US] (SP) <Reese.Wynn@ngc.com>
Subject: IBEX Orbit #665 ATS Approval (October 16 - 26, 2024)

CAUTION: This email originated from outside of the University System. Do not click links or open attachments unless you recognize the sender and know the content is safe.

 

All, 

   Attached are the planning files for Orbit #665. Please respond to this thread with comments and approvals. Approvals for the Orbit 665 ATS are required by COB, 05 October 2024.

 

 

Please note the following: 

 

Eclipse – Perigee

Eclipse Flag True: 2024/10/25 10:43:00

Eclipse Flag False: 2024/10/25 13:37:00

 

Command Load Constraint Violation Report (CCVR) 

IBEX_2024_290_0665_v001.ccvr

# Input files:         1

#   IBEX_2024_290_o0665a_v001.scr

 

==========================

HARD CONSTRAINT VIOLATIONS

==========================

NO VIOLATIONS.

 

==========================

SOFT CONSTRAINT VIOLATIONS

==========================

IBX-CLC-015: Battery charge falls below minimum from 2024/10/25 13:37:00 UTC -

             2024/10/25 22:02:00 UTC. Lowest charge level is 742.436594

             watt-minutes during this interval.

IBX-CLC-016: No command to enable spin pulse protection was found after

             transition to science mode at 2024/10/16 14:39:32 UTC

IBX-CLC-016: No command to enable spin pulse protection was found after

             transition to science mode at 2024/10/20 13:10:01 UTC

 

==============

OTHER MESSAGES

==============

NO MESSAGES.

 

 

Timothy E.Perry

CRS IBEX OCO-2

Mission Operations

timothy.perry@ngc.com

Office (703) 406-5976

IBEX MOC (703)404-7470

Cell (301) 606-1430