All,

I have looked at the orbit 369 ATS,

IBEX_2017_153_o0369a_v002.scr,

and I approve.

The only constraint violations in

IBEX_2017_153_o0369a_v001.ccvr

are from the removal of the

ACT_SetSpinPulseProtectEnable Enable

commands (2); the violations are expected.

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

IBEX_2017_153_o0369a_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_153_o0369a_v001.oef,

and as verified with ibex_orbit.

There are two star tracker outages. The first starts 1+ days before 15 Re descending and runs for 1+ days. The second starts about 4 hours before perigee and runs for 3 hours. Some despinning may be required due to the first 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_Orbit369_Contacts.txt,

for all contacts (3).

No battery cell balancing this orbit; we'll do it again in the next orbit.

The inertial maneuver at perigee of orbit 368 left us pointing in safe directions for the orbit 369 arc A ascending and descending sequences:

ibex_rotate -o -u 0.340091,0.866562,0.365251 -w ibex-sun -t 2017/06:03:10:20:58

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

points axis +1.000000,+0.000000,+0.000000

towards ECI +0.340091,+0.866562,+0.365251

which is R.A. +68.572 Decl. +21.423

missing R.A. +71.327 Decl. +22.307 (ibex-sun)

error is R.A. +2.755 Decl. +0.884

for a total 2.705 deg

ibex_rotate -o -u 0.340091,0.866562,0.365251 -w ibex-sun -t 2017/06:06:22:11:07

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

points axis +1.000000,+0.000000,+0.000000

towards ECI +0.340091,+0.866562,+0.365251

which is R.A. +68.572 Decl. +21.423

missing R.A. +75.016 Decl. +22.692 (ibex-sun)

error is R.A. +6.444 Decl. +1.269

for a total 6.105 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 0.27026,0.887413,0.373441 -w ibex-sun -t 2017/06:06:23:54:15

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

points axis +1.000000,+0.000000,+0.000000

towards ECI +0.270260,+0.887413,+0.373441

which is R.A. +73.062 Decl. +21.928

missing R.A. +75.091 Decl. +22.700 (ibex-sun)

error is R.A. +2.029 Decl. +0.772

for a total 2.030 deg

ibex_rotate -o -u 0.27026,0.887413,0.373441 -w ibex-sun -t 2017/06:07:01:29:21

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

points axis +1.000000,+0.000000,+0.000000

towards ECI +0.270260,+0.887413,+0.373441

which is R.A. +73.062 Decl. +21.928

missing R.A. +75.160 Decl. +22.708 (ibex-sun)

error is R.A. +2.098 Decl. +0.780

for a total 2.092 deg

ibex_rotate -o -u 0.27026,0.887413,0.373441 -w ibex-sun -t 2017/06:11:08:24:47

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

points axis +1.000000,+0.000000,+0.000000

towards ECI +0.270260,+0.887413,+0.373441

which is R.A. +73.062 Decl. +21.928

missing R.A. +79.557 Decl. +23.111 (ibex-sun)

error is R.A. +6.495 Decl. +1.183

for a total 6.114 deg

The inertial precession maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 370 apogee:

ibex_rotate -o -u 0.196946,0.903278,0.381183 -w ibex-sun -t 2017/06:11:15:11:14

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

points axis +1.000000,+0.000000,+0.000000

towards ECI +0.196946,+0.903278,+0.381183

which is R.A. +77.700 Decl. +22.407

missing R.A. +79.826 Decl. +23.123 (ibex-sun)

error is R.A. +2.126 Decl. +0.716

for a total 2.087 deg

ibex_rotate -o -u 0.196946,0.903278,0.381183 -w ibex-sun -t 2017-06-16T07:37:32.381Z

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

points axis +1.000000,+0.000000,+0.000000

towards ECI +0.196946,+0.903278,+0.381183

which is R.A. +77.700 Decl. +22.407

missing R.A. +84.739 Decl. +23.325 (ibex-sun)

error is R.A. +7.039 Decl. +0.918

for a total 6.550 deg

No Lo O-mode.

There is no overlap with orbit 368 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: "Sheral Wesley" <Sheral.Wesley@OrbitalATK.com>, "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" <fair-play@comcast.net>, "Ken Fairchild" <kwfairchild@gmail.com>, "Robert Lockwood" <Robert.Lockwood@OrbitalATK.com>, "Michelle Reno" <mreno@swri.edu>, "Nigel Angold" <nigel.angold@nasa.gov>, "Paul Janzen" <paul.janzen@umontana.edu>, "Timothy Perry" <Timothy.Perry@OrbitalATK.com>, "Ryan Tyler" <Ryan.Tyler@OrbitalATK.com>
Sent: Monday, May 22, 2017 3:10:39 PM
Subject: RE: IBEX Orbit# 369 ATS Approval v002 (2 Jun 17 - 11 Jun 17)

Guys,

IT seems that I emailed the working copy of the ATS

Here is the correct version

Sheral R. Wesley

Sr Systems Engineer

IBEX Mission OPS

CRS/CYGNUS Mission Planning

Bldg. 2 Room 1337

Office (703) 406-5641

Cell (202) 236-0802

cid:image001.jpg@01D04F6C.5A1C97F0

From: Wesley, Sheral
Sent: Monday, May 22, 2017 2:07 AM
To: David Heirtzler; IBEX-FDG; IBEXOPS; ISOC; Ken Fairchild; Ken Fairchild; Lockwood, Robert; Michelle Reno; Nigel Angold; Paul Janzen; Perry, Timothy; Tyler, Ryan; Wesley, Sheral
Subject: IBEX Orbit# 369 ATS Approval (2 Jun 17 - 11 Jun 17)

Guys,

Here are the planning files and ATS for Orbit# 369.

Please respond to this email thread with your comments and approvals

Approvals are required before 24 May 17 @1000 UTC

Note the following:

1. Command Load Constraint Violation Report

IBEX_2017_153_o0369a_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 2017/06/03 08:52:44 UTC

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

transition to science mode at 2017/06/07 00:59:21 UTC

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

OTHER MESSAGES

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

NO MESSAGES.

Sheral R. Wesley

Sr Systems Engineer

IBEX 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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