All,

I have looked at the orbit 387 ATS,

IBEX_2017_318_o0387a_v001.scr,

and I approve.

The only constraint violations in

IBEX_2017_318_o0387a_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_318_o0387a_v002.stf.

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_318_o0387a_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_Orbit387_Contacts.txt,

for all contacts (2).

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 386 left us pointing in safe directions for the orbit 387 arc A ascending and descending sequences:

ibex_rotate -o -u -0.645818,-0.696712,-0.312269 -w ibex-sun -t 2017/11:15:04:36:47

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

points axis +1.000000,+0.000000,+0.000000

towards ECI -0.645818,-0.696712,-0.312269

which is R.A. +227.171 Decl. -18.196

missing R.A. +230.384 Decl. -18.486 (ibex-sun)

error is R.A. +3.213 Decl. +0.290

for a total 3.063 deg

ibex_rotate -o -u -0.645818,-0.696712,-0.312269 -w ibex-sun -t 2017/11:18:19:33:44

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

points axis +1.000000,+0.000000,+0.000000

towards ECI -0.645818,-0.696712,-0.312269

which is R.A. +227.171 Decl. -18.196

missing R.A. +234.012 Decl. -19.357 (ibex-sun)

error is R.A. +6.841 Decl. +1.161

for a total 6.580 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 -0.581407,-0.742323,-0.33305 -w ibex-sun -t 2017/11:18:21:16:52

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

points axis +1.000000,+0.000000,+0.000000

towards ECI -0.581407,-0.742323,-0.333050

which is R.A. +231.931 Decl. -19.454

missing R.A. +234.086 Decl. -19.373 (ibex-sun)

error is R.A. +2.155 Decl. +0.081

for a total 2.034 deg

ibex_rotate -o -u -0.581407,-0.742323,-0.33305 -w ibex-sun -t 2017/11:18:22:51:58

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

points axis +1.000000,+0.000000,+0.000000

towards ECI -0.581407,-0.742323,-0.333050

which is R.A. +231.931 Decl. -19.454

missing R.A. +234.154 Decl. -19.387 (ibex-sun)

error is R.A. +2.223 Decl. +0.067

for a total 2.097 deg

ibex_rotate -o -u -0.581407,-0.742323,-0.33305 -w ibex-sun -t 2017/11:23:07:48:42

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

points axis +1.000000,+0.000000,+0.000000

towards ECI -0.581407,-0.742323,-0.333050

which is R.A. +231.931 Decl. -19.454

missing R.A. +238.816 Decl. -20.324 (ibex-sun)

error is R.A. +6.885 Decl. +0.870

for a total 6.532 deg

The inertial precession maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 388 apogee:

ibex_rotate -o -u -0.515795,-0.782244,-0.349357 -w ibex-sun -t 2017/11:23:10:08:30

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

points axis +1.000000,+0.000000,+0.000000

towards ECI -0.515795,-0.782244,-0.349357

which is R.A. +236.600 Decl. -20.448

missing R.A. +238.926 Decl. -20.347 (ibex-sun)

error is R.A. +2.326 Decl. +0.101

for a total 2.182 deg

ibex_rotate -o -u -0.515795,-0.782244,-0.349357 -w ibex-sun -t 2017-11-28T07:41:25.158Z

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

points axis +1.000000,+0.000000,+0.000000

towards ECI -0.515795,-0.782244,-0.349357

which is R.A. +236.600 Decl. -20.448

missing R.A. +244.052 Decl. -21.317 (ibex-sun)

error is R.A. +7.452 Decl. +0.869

for a total 7.015 deg

No Lo O-mode.

There is no overlap with orbit 386 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: Wednesday, November 1, 2017 10:13:45 AM
Subject: IBEX Orbit# 387 ATS Approval (14 Nov 17 - 23 Nov 17)

Guys,

Here are the planning files and ATS for Orbit# 387.

Please respond to this email thread with your comments and approvals

Approvals are required before 4 Nov 17 @1800 UTC

Note the following:

1. No battery balancing

2. APL Contact

· The contact has not been confirmed and the time could change

· The contact commands will be uploaded at a later date

3. Command Load Constraint Violation Report

IBEX_2017_318_o0387a_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 2017/11/15 02:51:59 UTC

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

transition to science mode at 2017/11/18 22:21:58 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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*********************