POLAR Telecon Agenda for September 28, 2007
0. Upcoming Polar Telecon
2. Polar SWT Meeting
3. Polar Mission Status
4. Polar-THEMIS coordination
5. Resident Archives
6. MFE Data Processing Status
7. PIXIE Science Report
0.† Upcoming Polar Telecon
Friday September 28, 2007
4 pm ET, 3 pm CT, 2 pm MT, 1 pm PT
PIs and their designated representatives will be telephoned at their usual numbers.
Other participants may call in at:† 1-800-988-9524
Password: Polar Telecon
(Leader: John Sigwarth)
The web site for the final agenda will be:
Future Polar Telecons
Next telecon: Friday November 30, 2007
(No Telecon in October due to SWG Meeting)
Future Telecon Science Discussion Schedule
[Errors/omissions/preferences to: email@example.com]
November 2007:† MDI
No December telecon due to AGU and Christmas holidays
January 2008:† CAMMICE
February 2008: VIS
March 2008: TIMAS
April 2008: Hydra
May 2008:† EFI
June 2008: MFE
July 2008:† CEPPAD
August 2008:† TIDE
September 2008:† PIXIE
October 2008:† UVI
If you have any concerns about Polar operations, please contact Nicky Fox (firstname.lastname@example.org)
Next Polar Sun Angle maneuver
Successful completion of the August 24 maneuver has allowed Polar to continue to operate until at least February 2008 when the next and final Polar attitude maneuver is scheduled.† The Polar reaction control system is running low on fuel, but analysis of the Polar fuel levels indicates that there is likely sufficient fuel for this final maneuver.
Previous estimates of Polar fuel used a bookkeeping method that calculated cumulative thruster time-on and nominal fuel flow rates to determine the fuel used and the fuel remaining in the tanks.† However, there exists additional fuel status information in the form of pressure and temperature in the Polar tanks.† The fuel remaining can be estimated from these values by using the ideal gas law (PV=nkT).† Revised analysis using these pressures and temperatures indicates that the current best estimate for remaining fuel is 9 kg +/- 8 kg with approximately 6.4 kg of fuel required for the maneuver.† The estimated remaining fuel can be seen in this Figure.
Fall Eclipse Season
The fall eclipse season passed without incident this year (ending on September 4, 2007) and no instruments had to be powered down.
Fall Low Power Season
The Polar engineers have determined that our fall low power season will be from 10/31 through 12/1.† This is when the Polar sun angle will be at or above 150 degrees.† The spacecraft contacts will be as short as possible to allow the batteries maximum time for recharge between contacts and to maintain the battery temperatures within green limits.† We are hopeful that with careful management of the spacecraft resources, all instruments will be able to operate during the period.† However, all PI teams should be prepared for a contingency to turn off some of the instruments in order to maintain a power positive condition.† The spacecraft bus voltages will be closely monitored throughout the low power season.
The 12 hour shifts during the weekdays are still being covered as usual and the MOC staff has a pager to cover emergencies on the weekend.
MOC staff pager: 301-224-0386
Mike Machado should be contacted by cell phone for instrument emergencies.
Mike's cell phone: 443-694-4317
2. Polar SWT Meeting
The Polar Team and interested collaborators are gathering for a Polar Mission Science Workshop at the Greenbelt Marriott. The meeting is scheduled for October 24-25, 2007. Please see the workshop website for hotel and registration details:
There will be a number of topics discussed at the meeting:
1. Plans for Polar-THEMIS coordination to support the THEMIS tail science campaign to the maximum extent possible in early 2008.
2. End of operations including the passivation of the spacecraft, and the closeout of the ground operations activities, etc.
3. Completion of instrument teamsí data processing and resident archive activities
Anyone wishing to present at the meeting should email Nicky (email@example.com)
There is no registration fee for this meeting, but we do need to have a final head count by October 18th so please encourage your team members to register early.
3. Resident Archives
The call for resident archive maintenance (i.e. the follow-on funding for your resident archive) is in the current ROSES FY2007 solicitation, appendix B9, section 1.3.† The notice of intent was due September 12, 2007 and the proposals are due November 15, 2007.† The Polar funding will be running out by the time these proposals are selected so propose to this call for maintenance of your resident archives beyond the end of the Polar mission. Keep in mind that a Resident Archive grant will not support additional processing or reprocessing of data.
As we discussed in previous telecons, we need to continue to work toward finalizing the resident archive plans and their implementation.†
Each team will be expected to provide a status update at the SWG meeting next month. These status reports should cover: What products need to be made available to the community [images, survey plots, custom plots, analysis software, documentation, etc.]?† What is the best method to provide these products?† Do we need to poll the broader community for input?
4. MFE Data Processing Status
5.† The UVI Science Report