All,

I have looked at the orbit 413 ATS,

IBEX_2018_189_o0413a_v001.scr,

and I approve.

The only constraint violations in

IBEX_2018_189_o0413a_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_2018_189_o0413a_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_2018_189_o0413a_v001.oef,

and as verified with ibex_orbit.

There is one star tracker outage. The outage starts about 3 hours before perigee and runs for about 8 hours. No despinning should be required due to this outage.

There are no moon in Lo FOV sessions.

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

IBEX_Orbit413_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 412 left us pointing in safe directions for the orbit 413 arc A ascending and descending sequences:

ibex_rotate -o -u -0.238011,0.894762,0.377825 -w ibex-sun -t 2018/07:08:22:33:21

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

points axis +1.000000,+0.000000,+0.000000

towards ECI -0.238011,+0.894762,+0.377825

which is R.A. +104.896 Decl. +22.199

missing R.A. +107.809 Decl. +22.405 (ibex-sun)

error is R.A. +2.913 Decl. +0.206

for a total 2.703 deg

ibex_rotate -o -u -0.238011,0.894762,0.377825 -w ibex-sun -t 2018/07:12:16:55:51

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

points axis +1.000000,+0.000000,+0.000000

towards ECI -0.238011,+0.894762,+0.377825

which is R.A. +104.896 Decl. +22.199

missing R.A. +111.673 Decl. +21.925 (ibex-sun)

error is R.A. +6.777 Decl. +0.274

for a total 6.286 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 -0.312009,0.875739,0.368417 -w ibex-sun -t 2018/07:12:18:38:59

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

points axis +1.000000,+0.000000,+0.000000

towards ECI -0.312009,+0.875739,+0.368417

which is R.A. +109.610 Decl. +21.618

missing R.A. +111.747 Decl. +21.916 (ibex-sun)

error is R.A. +2.137 Decl. +0.298

for a total 2.007 deg

ibex_rotate -o -u -0.312009,0.875739,0.368417 -w ibex-sun -t 2018/07:12:20:14:05

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

points axis +1.000000,+0.000000,+0.000000

towards ECI -0.312009,+0.875739,+0.368417

which is R.A. +109.610 Decl. +21.618

missing R.A. +111.816 Decl. +21.907 (ibex-sun)

error is R.A. +2.206 Decl. +0.289

for a total 2.069 deg

ibex_rotate -o -u -0.312009,0.875739,0.368417 -w ibex-sun -t 2018/07:17:10:30:51

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

points axis +1.000000,+0.000000,+0.000000

towards ECI -0.312009,+0.875739,+0.368417

which is R.A. +109.610 Decl. +21.618

missing R.A. +116.513 Decl. +21.226 (ibex-sun)

error is R.A. +6.903 Decl. +0.392

for a total 6.438 deg

The inertial maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 414 apogee:

ibex_rotate -o -u -0.386846,0.849681,0.358319 -w ibex-sun -t 2018/07:17:13:04:42

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

points axis +1.000000,+0.000000,+0.000000

towards ECI -0.386846,+0.849681,+0.358319

which is R.A. +114.479 Decl. +20.997

missing R.A. +116.616 Decl. +21.206 (ibex-sun)

error is R.A. +2.137 Decl. +0.209

for a total 2.004 deg

ibex_rotate -o -u -0.386846,0.849681,0.358319 -w ibex-sun -t 2018-07-22T12:36:20.669Z

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

points axis +1.000000,+0.000000,+0.000000

towards ECI -0.386846,+0.849681,+0.358319

which is R.A. +114.479 Decl. +20.997

missing R.A. +121.550 Decl. +20.266 (ibex-sun)

error is R.A. +7.071 Decl. +0.731

for a total 6.658 deg

No Lo O-mode.

There is no overlap with orbit 412 commands by manual inspection or by checking at

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

Command Approval Checklist is attached.

Ken

On June 25, 2018 at 4:30 PM "Wesley, Sheral" <Sheral.Wesley@OrbitalATK.com> wrote:

Guys,
Here are the planning files and ATS for Orbit# 413
Please respond to this email with your comments and approvals
Approvals are required before 27 Jun 18 @1800 UTC

Note the following:
1.       No battery balancing
2.       30 Minute Perigee Tracking Contact
IBEX,AUWA01,ADD,07/18/18,199,03:30:00,07/18/18,199,04:00:00,,LAHO 2K IBEX-2 Orbit# 413 Perigee Tracking Contact
3.       Command Load Constraint Violation Report
IBEX_2018_189_o0413a_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 2018/07/08 20:46:17 UTC
IBX-CLC-016: No command to enable spin pulse protection was found after
             transition to science mode at 2018/07/12 19:44:05 UTC

==============
OTHER MESSAGES
==============
NO MESSAGES.

Sheral R. Wesley
Sr Systems Engineer
IBEX , OCO2 Mission OPS
CRS/CYGNUS Mission Planning
Northrop Grumman Innovation Systems
Bldg. 2   Room 1337
Office (703) 406-5641
Cell (202) 236-0802

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Thank you.
*********************