All,

I have looked at the orbit 384 ATS,

IBEX_2017_291_o0384a_v001.scr,

and I approve.

The only constraint violations in

IBEX_2017_291_o0384a_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_2017_291_o0384a_v002.stf,

except the ATS has an SSR_DUMP_NEW command. This is expected as APL is being used for the dump pass.

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

IBEX_2017_291_o0384a_v001.oef,

and as verified with ibex_orbit.

There are no star tracker outages.

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_Orbit384_Contacts.txt,

for all contacts (3).

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 383 left us pointing in safe directions for the orbit 384 arc A ascending and descending sequences:

ibex_rotate -o -u -0.924721,-0.345408,-0.15995 -w ibex-sun -t 2017/10:18:17:36:25

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

points axis +1.000000,+0.000000,+0.000000

towards ECI -0.924721,-0.345408,-0.159950

which is R.A. +200.482 Decl. -9.204

missing R.A. +203.450 Decl. -9.806 (ibex-sun)

error is R.A. +2.968 Decl. +0.602

for a total 2.989 deg

ibex_rotate -o -u -0.924721,-0.345408,-0.15995 -w ibex-sun -t 2017/10:22:09:08:05

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

points axis +1.000000,+0.000000,+0.000000

towards ECI -0.924721,-0.345408,-0.159950

which is R.A. +200.482 Decl. -9.204

missing R.A. +206.768 Decl. -11.076 (ibex-sun)

error is R.A. +6.286 Decl. +1.872

for a total 6.464 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 -0.891339,-0.411724,-0.18973 -w ibex-sun -t 2017/10:22:10:51:13

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

points axis +1.000000,+0.000000,+0.000000

towards ECI -0.891339,-0.411724,-0.189730

which is R.A. +204.793 Decl. -10.937

missing R.A. +206.836 Decl. -11.100 (ibex-sun)

error is R.A. +2.043 Decl. +0.163

for a total 2.011 deg

ibex_rotate -o -u -0.891339,-0.411724,-0.18973 -w ibex-sun -t 2017/10:22:12:26:19

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

points axis +1.000000,+0.000000,+0.000000

towards ECI -0.891339,-0.411724,-0.189730

which is R.A. +204.793 Decl. -10.937

missing R.A. +206.898 Decl. -11.122 (ibex-sun)

error is R.A. +2.105 Decl. +0.185

for a total 2.074 deg

ibex_rotate -o -u -0.891339,-0.411724,-0.18973 -w ibex-sun -t 2017/10:26:22:20:50

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

points axis +1.000000,+0.000000,+0.000000

towards ECI -0.891339,-0.411724,-0.189730

which is R.A. +204.793 Decl. -10.937

missing R.A. +211.232 Decl. -12.643 (ibex-sun)

error is R.A. +6.440 Decl. +1.706

for a total 6.530 deg

The inertial precession maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 385 apogee:

ibex_rotate -o -u -0.853101,-0.474889,-0.216099 -w ibex-sun -t 2017/10:27:00:50:13

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

points axis +1.000000,+0.000000,+0.000000

towards ECI -0.853101,-0.474889,-0.216099

which is R.A. +209.103 Decl. -12.480

missing R.A. +211.338 Decl. -12.683 (ibex-sun)

error is R.A. +2.235 Decl. +0.203

for a total 2.191 deg

ibex_rotate -o -u -0.853101,-0.474889,-0.216099 -w ibex-sun -t 2017-10-31T22:29:47.794Z

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

points axis +1.000000,+0.000000,+0.000000

towards ECI -0.853101,-0.474889,-0.216099

which is R.A. +209.103 Decl. -12.480

missing R.A. +215.966 Decl. -14.306 (ibex-sun)

error is R.A. +6.863 Decl. +1.826

for a total 6.921 deg

No Lo O-mode.

There is no overlap with orbit 383 commands by manual inspection or by checking at

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

Command Approval Checklist is attached.

Ken

From: "Sheral Wesley" <Sheral.Wesley@OrbitalATK.com>
To: "Eric Chubin" <Eric.Chubin@OrbitalATK.com>, "Colin Joyce" <cjl46@wildcats.unh.edu>, "David Heirtzler" <dheirtzl@atlas.sr.unh.edu>, "IBEX-FDG" <IBEX.fdg@applieddefense.com>, "IBEXOPS" <IBEXOPS@gmail.com>, "ISOC" <isocops@lists.sr.unh.edu>, "Ken Fairchild" <kwfairchild@gmail.com>, "Ken Fairchild" <fair-play@comcast.net>, "Robert Lockwood" <Robert.Lockwood@OrbitalATK.com>, "Nigel Angold" <nigel.angold@nasa.gov>, "Paul Janzen" <paul.janzen@umontana.edu>, "Timothy Perry" <Timothy.Perry@OrbitalATK.com>, "Ryan Tyler" <Ryan.Tyler@OrbitalATK.com>, "Sheral Wesley" <Sheral.Wesley@OrbitalATK.com>
Sent: Thursday, October 5, 2017 12:44:57 PM
Subject: IBEX Orbit# 384 ATS (18 Oct 17 - 27 Oct 17)

Guys,

Here are the planning files and ATS for Orbit# 384.

Please respond to this email thread with your comments and approvals

Approvals are required before 6 Oct 17 @1200 UTC

Note the following:

1. APL-18 SSR_Dump Contact (2-320k)

SetRelay stx,on $TIME=2017/10:27:03:58:00

SetDownlink2K $TIME=2017/10:27:03:58:02

Set_SetBilevelOutputControlReg STXMODE_Strobe,ON $TIME=2017/10:27:03:58:04

SetBilevelOutputControlReg COHERENT,ON $TIME=2017/10:27:03:58:06

SetDownlink320K $TIME=2017/10:27:04:05:00

SSR_DUMP_NEW $TIME=2017/10:27:04:10:00

SetRelay stx,off $TIME=2017/10:27:05:02:00

2. IBEX_Hi Gain Test

Orbit# 384 APOGEE: IBEX_Hi Gain Test (19 Oct 17 @10:19:19:30:36 - 10:19:23:45:41)

3. Command Load Constraint Violation Report

IBEX_2017_291_o0384a_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 2017/10/18 15:41:33 UTC

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

transition to science mode at 2017/10/22 11:56:19 UTC

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

OTHER MESSAGES

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

NO MESSAGES.

Sheral R. Wesley

Sr Systems Engineer

IBEX , OCO2 Mission OPS

CRS/CYGNUS Mission Planning

Bldg. 2 Room 1337

Office (703) 406-5641

Cell (202) 236-0802

cid:image001.jpg@01D04F6C.5A1C97F0

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*********************