Overview of the SORCE Mission

Transcription

1 Overview of the SORCE Mission LASP University of Colorado 1

2 The SORCE mission is one element of NASA s Earth Science Enterprise. Primary science objective of SORCE is: measurement of solar irradiance both total and spectral irradiance. The SORCE Mission The SORCE carries four solar irradiance instruments designed and built at LASP. The SORCE spacecraft was developed by Orbital Sciences Corporation. The SORCE was launched on a Pegasus XL rocket on January 25, 2003, and is in a 40 inclination orbit at an altitude of 620 km. The SORCE is operated from a control center at LASP. Mass Power ACS (3-axis) S-band Data Storage 282 kg 730 W 1 arc-min 1.2 Mbps down 2 kbps up 1GB 2

3 SORCE Instruments Total Irradiance Monitor (TIM) TIM SIM Spectral Irradiance Monitor (SIM) nm EGS SOLSTICE TIMED SOLar STellar Irradiance Comparison Experiment (SOLSTICE) nm XPS XUV Photometer System (XPS) 1 34 nm 3

4 Light Curves of the October 2003 and X17 Flare Woods et al., GRL, 31, 20 May

5 Read All About It (SORCE) 17 papers on the SORCE Science, Instruments, Spacecraft, and Data to appear in a Special Issue of Solar Physics August 2005 To be published as a book by Kluwer Academic Press later this year 5

6 Principal Investigator: University of Colorado at Boulder Co-Investigators: Laboratory for Atmospheric and Space Physics (LASP) 1. Thomas Woods 1, 2, 3 Project Scientist, XPS Instrument University of Colorado/LASP 2. George Lawrence 2,3 Detectors, TIM Instrument University of Colorado/LASP 3. Greg Kopp 3 TIM Instrument University of Colorado/LASP 4. Jerry Harder 2,3 SIM Instrument University of Colorado/LASP 5. Bill McClintock 2,3 SOLSTICE Science University of Colorado/LASP 6. Julius London 1, 2, 3 Atmospheric Sciences 7. Oran R. White 2,3 Solar Physics NCAR/High Altitude Observatory 8. Peter Fox 2,3 Solar Modeling NCAR/High Altitude Observatory 9. Peter Pilewskie 3 Atmospheric Radiation NASA AMES 10. Judith Lean 3 Solar Modeling and Observations Naval Research Laboratory 11. Paul Simon 1, 2, 3 Atmospheric Response Belgium 12. Dominique Crommelynck 3 Precision Radiometry Belgium 13. Claus Fröhlich 3 Precision Radiometry Switzerland NASA Project Scientist: Robert Cahalan Doug Rabin (Deputy) NASA Program Scientist: Don Anderson NASA GSFC NASA GSFC NASA Headquarters 1) EOS SOLSTICE (1988); 2) TSIM (1997); 3) SORCE (1999) 6

7 Principal Investigator: Thomas Woods University of Colorado at Boulder Co-Investigators: Laboratory for Atmospheric and Space Physics (LASP) 1. Greg Kopp 3 TIM Instrument University of Colorado/LASP 2. Jerry Harder 2,3 SIM Instrument University of Colorado/LASP 3. Bill McClintock 2,3 SOLSTICE Science University of Colorado/LASP 4. 1, 2, 3 University of Colorado/LASP 5. George Lawrence 2,3 University of Colorado/LASP 6. Julius London 1, 2, 3 Atmospheric Sciences 7. Oran R. White 2,3 Solar Physics NCAR/High Altitude Observatory 8. Peter Fox 2,3 Solar Modeling NCAR/High Altitude Observatory 9. Peter Pilewskie 3 Atmospheric Radiation NASA AMES 10. Judith Lean 3 Solar Modeling and Observations Naval Research Laboratory 11. Paul Simon 1, 2, 3 Atmospheric Response Belgium 12. Dominique Crommelynck 3 Precision Radiometry Belgium 13. Claus Fröhlich 3 Precision Radiometry Switzerland NASA Project Scientist: Robert Cahalan Doug Rabin (Deputy) NASA Program Scientist: Don Anderson NASA GSFC NASA GSFC NASA Headquarters 1) EOS SOLSTICE (1988); 2) TSIM (1997); 3) SORCE (1999) 7

8 Follow-On to SORCE (after 2008) 2007 to 2011 NASA plans a Solar Irradiance Gap Filler (SIGF) that will be partially accomplished by placing a LASP TIM on the GSFC GLORY Mission. This will continue the long-term data record of TSI, but will not continue the spectral measurements of SORCE. There are no current plans by NASA to continue the UV ( < 200 nm) irradiance observations of SME, UARS, TIMED, and SORCE. GLORY 12/ to NOAA/DOD/NASA will conduct the NPOESS (National Polar Orbiting Operational Environmental Satellite System) from 2010 onward. The payload will include the TSIS (Total Solar Irradiance Sensor) which includes a TIM and SIM instrument and a pointing platform. LASP is under contract with NGST to provide TSIS for a series of NPOESS spacecraft. There are no plans for the UV spectral irradiance to be provided on the future missions NPOESS