# Presentation: 076971

## EOS Aura

**Boulder, Colorado**
**September 11 - 15, 2006**

- Angelita C. Kelly
- Earth Science Mission Operations Project
- Science Interface Manager
- Constellation Team Manager
- NASA/Goddard Space Flight Center
- Greenbelt, Md. 20771

**EOS Aura**
**Mission Operations  Working Group **
**(MOWG) Meeting**

## EOS AURA Mission Operations 

| 13:00 | Greetings/Introduction/Agenda Review | All |
| --- | --- | --- |
| 13:15 | EOS Aura Status | A. Kelly |
| 13:30 | HIRDLS | J. Craft/J. Barnett/
C. Hepplewhite |
| 13:50 | MLS  | D. Miller/D. Cuddy |
| 14:10 | OMIS | J. Claas |
| 14:30 | TES | R. Murdock |
| 15:00 | MMS IST Redesign and New Operations Concept   | Raytheon |
| 15:40 | EDOS Update | C. Gomez |
| 16:00 | SSR Auto Operations Concept | A. Kelly |
| 16:30 | Summary/Actions/Next Steps |  |
| 17:00 | Adjourn  |  |

**EOS AURA Mission Operations **
**Working Group Meeting**** ****Boulder, Colorado, September 12, 2006**

## TOPICS

- ESMO Organization Update
- Aura’s Neighborhood
- Aura Mission Operations Status
- Data Losses
- ESMO’s Cost Reduction Activities/Plans
- Summary

## GSFC Earth Science Mission Operations(ESMO) Organization

**GSFC Earth Science Mission Operations****(ESMO) Organization**

**Project Manager**
**John Gainsborough**
**Deputy Project Manager**
- Chris Wilkinson

**Constellation and**
**Science I/F**
**Manager**
- Angie Kelly

**Business Manager**
- Phil Shimkaveg

**Mission Systems**
- Gordon Knoble

**Flight Operations**
**Mission Directors**
- Bill Guit, .....

**Mission Safety**

**Configuration Mgmt**

**EMOS**

**Networks**

**EDOS (Carlos Gomez)**

**Flight Dynamics (FDS)**

**Systems Engineering**

**IT Security**

**Proj Scientists,**
**Science Teams**
**Instrument**
**Operations**
**Teams**
**(IOTs)**

- = external interfaces

**FOT**
**Instrument**
**Engineers:**
- J. Nidhiry
- J. Purcell

- = contractor interface

## Aura’s Neighborhood

## Earth Science Afternoon Constellation

**(A-Train)**

***Afternoon Constellation***

**CloudSat and CALIPSO** were launched 28 April 2006
- -- joined the Afternoon Constellation May 31.
-  There are now **5 on-orbit satellites in the “A-Train”.**
-  **Glory **planning to be **~4 minutes behind Aqua**
-  **OCO and Glory missions will launch in late 2008**
-  All A-Train satellites currently performing Inclination Adjust Maneuvers

## Relative Positions of Satellites (one orbit) Earth Science Morning and Afternoon Constellations(From Ground Station Perspective)

*Descending Node*

*Ascending Node*

***North***

***South***

*5-Min Interval*

- _Notes:_
- Terra 30 min behind Landsat-7
- Aqua 25 min behind Terra
- Aura 15 min behind Aqua
- SAC-C and EO-1drifting relative to other satellites

***Launched***
***28 April 2006***

***2008 launch***

***2008 launch***

**Landsat-7**

**SAC-C**

**Aqua**

**CloudSat**

**CALIPSO**

**EO-1**

**Terra**

**OCO**

**PARASOL**

**Glory**

**Aura**

## Coordinated ConstellationInclination Adjust Maneuvers (Aug/Sep/Oct 2006)                            

| Sun | Mon | Tue | Wed | Thu | Fri | Sat |
| --- | --- | --- | --- | --- | --- | --- |
| 13 August | 14 | 15 | 16 Telecon | 17 | 18 | 19 |
| 20 | 21 | 22 Aqua IAM #8 | 23 Telecon
PARASOL #1 | 24 Aura IAM #5 | 25 | 26
CS #1 |
| 27 | 28 | 29 Aqua IAM #9
CALIPSO #1 | 30 Telecon | 31 Aura IAM #6 | 01 September
CS #2 | 02 |
| 03 | 04 HOLIDAY | 05  | 06 
PARASOL PBM | 07 Aqua IAM #10 | 08 | 09 |
| 10 | 11 Telecon
Ideal Date | 12 Aqua IAM #11 | 13
PARASOL #2 | 14 Aura IAM #7 | 15 | 16 |
| 17 | 18 | 19 Aqua IAM #12
CALIPSO BM | 20 Solar Eclipse
PARASOL #3 | 21 Aura IAM #8
Telecon | 22 | 23 Equinox |
| 24 | 25 | 26 Aqua IAM #13
CloudSat #3 | 27 Telecon
PARASOL #4 | 28 Aura IAM #9 | 29
CALIPSO #2 | 30 |
| 01 
October | 02
CloudSat #4 | 03 Aqua Back-Up | 04 Telecon | 05 Aura IAM #10 | 06 | 07 |
| 08 | 09
HOLIDAY | 10 | 11 Telecon | 12 Aura Back-Up | 13 | 14 |

## Mission Operations Status 

**EOS Aura**

## Since our last meeting....

- 11/08/05: Science Team Meeting & MOWG, Den Haag
- 12/02/05: TES Optical Bench Warm Up
- 12/31/05: Leap Second
- 02/15/06: MLS Band 13 Shutdown (modified ops concept)
- 02/28/06: OMI FMM Anomaly (modified ops concept)
- 03/29/06: MLS Anomalous AAA Movement
- 04/07/06: MLS Band 10 and 29 Shutdown (on for polar winter)
- 04/14/06: Expanded Direct Broadcast (increased DB data)
- 04/28/06: CloudSat & CALIPSO Launched
- Mid-May:  IST Incident, New Online Interface, etc.........
- 06/07/06: Norway Communications Outage--Data Loss
- 07/05/06: Norway Communications Outage--Data Loss
**07/15/06: 2-Year Anniversary**
- 08/31/06: TES Filter Wheel Anomaly (nominal ops 9/9)

## Instruments

- Instrument Status - **GREEN**
- HIRDLS: Operating Normally
- Collecting data through reduced aperture
- Next Pitch Maneuver November 3, 2006
- MLS: Operating Normally
- Band 13 measurements currently suspended
- OMI: Operating Normally
- Resumed Normal Operations on June 12, 2006
- TES: Operating Normally
- Resumed normal operations on September 9, 2006

## Spacecraft Subsystems

- Command & Data Handling (CDH) – **Nominal**
- Solid State Recorder (SSR) – holds 3 orbits of data
- Communications (COMM) - **Nominal**
- Electrical Power System (EPS) – **Nominal**
*Solar Panel Connector Anomaly (January 12, 2005)*
- Flight Software (FSW) - **Nominal**
- Guidance, Navigation & Control (GN&C) - **Nominal**
- Propulsion (PROP) - **Nominal**
- Thermal Control System (TCS) – **Nominal**

**All subsystems configured to primary hardware.**

## Activities

- Current/Ongoing
- 6 Inclination Adjust Maneuvers (IAMs)
- August 24  & 31st -- completed
- September 14th, 21st & 28th
- October 5th & 12th (Back-Up Date)
- Planned
- Nov 3rd – HIRDLS Pitch Maneuver
***Note:  IOTs need to provide ESMO a schedule of future         ******	******     campaigns or special activities on a regular basis.***

## Data Losses

- June 7, 2006 – Norway Communications Outage
- Service provider disrupted service on the redundant circuit while trouble-shooting a problem on the prime circuit.
**Instrument Science Data Losses: (~52 min)**
- HIRDLS	158/03:56:40 – 04:48:14 GMT
- MLS		158/03:56:39 – 04:48:14 GMT
- OMI		158/03:57:04 – 04:58:51 GMT
- July 5, 2006 – Norway Communications Outage
**Instrument Science Data Losses: (4****h**** 22****m**** 07****s****)**
- HIRDLS	186/01:04:28 – 05:10:38 GMT
- MLS		186/01:04:28 – 05:10:38 GMT
- OMI		186/01:04:57 – 05:27:04 GMT
- TES		No TES Data Loss (TES was between GS 			observations)

## End of Mission Requirement  (Fuel needed to ensure re-entry in 25 years)

- GSFC

- End of Mission Requirement  (Fuel needed to ensure re-entry in 25 years)

| S/C | Flux level | Perigee Height (Km) | Minimum
Fuel Required (kg) | Current Fuel Level
 (kg) |
| --- | --- | --- | --- | --- |
| Aqua | Low | 433 | 125 | 179 |
| Aqua | Nominal | 491 | 95 |  |
| Aura | Low | 438 | 114 | 191 |
| Aura | Nominal | 491 | 95 |  |

**Worst case analysis for Aura indicates ****minimum of 8-10 years of remaining life**** – saving 114 kg of fuel for EOM**
**ESMO Flight Dynamics analysis indicates Aura has sufficient propellant reserves to last until 2015**

## Summary

- Spacecraft Status - **GREEN**
- Instrument Status - **GREEN**
- HIRDLS: Operating Normally
- Collecting data through reduced aperture
- Next Pitch Maneuver November 3, 2006
- MLS: Operating Normally
- Band 13 measurements currently suspended
- OMI: Operating Normally
- Resumed Normal Operations on June 12, 2006
- TES: Operating Normally
- Resumed normal operations on September 9, 2006
- Data Capture/L0 Processing Status – **GREEN**
**SSR Data Capture to 07/31/2006:  99.67 %**

## ESMO’S Cost Reduction Activities/Plans

## ESMO’s Cost Reduction Activities/Plans

- To cope with ESMO’s shrinking operations budget:
-  Aqua/Aura “Single-S/C-Ops”
- Same FOT staff for Aura and Aqua spacecraft operations
- Takes advantage of spacecraft bus similarities
- Aqua/Aura Solid State Recorder Auto Ops (“Dump-N-Go”)
- Eliminates the need for ground commanding for normal SSR operations
- Provides a capability to receive science data in the event of a major communication outage
- Science Teams have concerns over data losses due to Auto Ops
**ESMO management needs feedback from science teams**
- Aqua/Aura Automation (“Lights-Dim” Ops)--long term
- Goal is for one person staffing during off-shift operations with “fire-watch” approach to anomalies and data losses

## Reminder

*	**The IOTs and the FOT must continue to be diligent in performing their day-to-day activities to ensure the  safety of the spacecraft and the instruments.  Negligence can kill the instrument and/or spacecraft.*

## Additional Information

## Old Spacecraft Anomalies

- EPS ARE–3C not supplying power to S/C Bus
- Started January 12, 2005: Degraded to zero output in 4 orbits
- No interruption to S/C or Instrument Operations
- ESMO Anomaly Resolution Team Formed
- NGST, AETD, FOT, MD
- ARE-3C taken off-line March 10, 2005
- GSFC/AETD Anomaly Review Board Final Report
- Most Likely Cause: **Disengaged Solar Array connector**
- Believed to be an isolated workmanship related problem
**Impact: Available End of Life (EOL) power margin dropped from 24% to 17%**
**No impact to operations or 6-year life ****expectancy**

## 2005 Major Events

- 01/12/05: Solar Array Anomaly
- 02/01/05: HIRDLS Transition to ESMO
- HQ review 02/11/05
- 03/02/05: Science Team Meeting
- 04/11/05: TES Operations Suspended
- 05/26/05: TES ICS Velocity Anomaly
- 07/15/05: 1-Year Anniversary
- 09/13/05: TES Operations Suspended
- Review at JPL 10/19/05

## Maneuver Locations

## Propellant Usage

- Orbit Raise Maneuvers

- Orbit Inclination Maneuvers