GOES Data Status Mutual Benefits of NASA THEMIS and NOAA GOES Results from all of the THEMIS science objectives will contribute to advances in space weather specification and forecasting. Onset and evolution of substorm instability Radiation belts and storm-time MeV electrons Solar wind – magnetosphere coupling NOAA forecasts and information on space environment conditions may be useful for THEMIS operations. NOAA observations from GOES and POES can play a key complementary role in supporting THEMIS science.

GOES Space Environment Data For THEMIS Science GOES normally located at 75o and 135o west geographic longitude In addition to solar observations, in-situ Space Environment Monitor instruments include: - Magnetometer – 0.5 s sample rate - Energetic electron, proton, and alpha particle fluxes: e (3 channels): 0.6 to >4.0 MeV, p (11 channels): 0.8 to >700 MeV, a (8 channels): 4 to >3400 MeV GOES N (new series) launch ‘06, may be in storage until ‘08; includes lower energy electron (30 keV) and proton (80 keV) bands, and more look directions (out-of-storage test 7/17/07-~8/15/07. Figure courtesy E. Donovan GOES locations are excellent for studying the inner- magnetosphere response to events observed by THEMIS and ground-based observatories.

Locations of Ground Stations and the GOES Field-line Intercept Good ground-based coverage will foster conjugate studies with GOES.

Surveying Data with Combined Magnetometer and Particle Data: An Example Substorm growth and expansion phase observed at GOES and LANL geosynchronous spacecraft. LANL SOPA Energetic Particles p: 50 – 400 keV e: 50 – 315 keV GOES 10 and 12 Magnetic Field Inclination Survey plots combining magnetometer and particle data aid in the selection and understanding of events. Figure courtesy LANL and Mike Henderson

GOES Magnetometer Torquer Current Corrections: in Response to Satellite Telemetry Changes Old New

GOES Reprocessing: Intervals to Process (in 15 day segments) GOES-8 May 1, 1994 Apr 10, 2003 GOES-8 May 6, 2003 June 15, 2003 GOES-9 Jun 4, 1995 Jul 27, 1998 GOES-9 Nov 30, 1999 Dec 14, 1999 GOES-9 Nov 14, 2001 Jan 16, 2002 GOES-9 Apr 15, 2002 Apr 24, 2002 GOES-10 May 7, 1997 Nov 3, 1997 GOES-10 Jan 14, 1998 Jun 1, 1998 GOES-10 Jul 10, 1998 Present date GOES-11 May 15, 2000 Aug 14, 2000 GOES-11 May 31, 2001 Jun 11, 2001 GOES-11 May 30, 2002 Jun 21, 2002 GOES-11 Jun 21, 2003 Jul 1, 2003 GOES-11 Jun 5, 2004 Jun 29, 2004 GOES-11 Jul 6, 2005 Aug 2, 2005 GOES-11 May 16, 2006 Present Date GOES-12 Aug 15, 2001 Dec 19, 2001 GOES-12 Jan 11, 2003 Present date Start with GOES 10 and will soon begin operational satellites GOES 11 and 12 (processing following each ½ month) --- assuming needed staff is allocated

NOAA’s National Geophysical Data Center GOES 8-12 Data Provided to NOAA’s National Geophysical Data Center Data included in the 0.512 s data file: Date-time: The date and time of the data Hp: corrected magnetic parallel field He: corrected magnetic earthward field Hn: corrected magnetic eastward field Ht: corrected magnetic total field Data Quality Flag Torquer 1 filtered counts Torquer 2 filtered counts Data included in the 1-minute averaged data file: NGDC will be storing the data in netCDF, but they have said they will accommodate other user requested formats.

Backup on GOES 13 GOES 13, O, P

GOES 13 Magnetometer Specifications Instrument Manufacturer SAIC/Nanotesla Satellite Manufacturer Boeing (3-axis stabilized) Sample Rate 1 sample / 0.512 s Range +/- 512 nT and +/-65535 Quantization 16 bit analog-to-digital converter Resolution 0.015 nT Anti-aliasing Filter Five-pole 0.5 Hz Butterworth low-pass filter Primary Instrument Sensors Located on end of 8.5 m AEC/Able boom Secondary Instrument Sensors Located 0.8 m inboard of primary sensors Accuracy +/- 1 nT

GOES 13 Energetic Particle Sensors Magnetospheric Electron Detector (MAGED): 9 look directions for (5 azimuth and 5 elevation with shared center) 5 energy channels in each look direction: 30 keV – 600 keV Magnetospheric Proton Detector (MAGPD): 5 energy channels in each look direction: 80 keV – 800 keV Energetic Proton Electron and Alpha Detector (EPEAD): 2 look directions (East and West) 3 electron energy channels: > 0.6 MeV, > 2 MeV, > 4 MeV 7 proton energy channels: 0.7 – 900 MeV 6 alpha particle energy channels: 4 – 500 MeV High Energy Proton and Alpha Detector (HEPAD): 1 look direction 4 proton energy channels: 330 – >700 MeV 2 alpha particle channels: 2560 – >3400 MeV

GOES 10, 12, 13 Magnetic Field Comparison October 13, 2006 GOES 10 89.5 deg GOES 13 89.2 deg GOES 12 75.0 deg Hp He 10 nT / div All Frames Hn Ht 0 UT 06 UT 12 UT 18 UT 24 UT Notes: GOES 12: 1 min avg; GOES 10 & 13: 0.5s Orbit inclinations: GOES 10 1.1 deg GOES 13 0.33 deg

Magnetic Substorm Signatures at Geosynchronous Orbit H (north) D (east) H D H D Nagai, JGR, 87, 4405, 1982.

Magnetic Substorm Signatures at Geosynchronous Orbit P GOES 11 11 D N 11 H GOES 10 10 12 13 10 P H ~ P D ~ N D N H GOES 13 Multi-satellite comparison with Nagai statistical model P 13 D N H GOES 12 P 12 D N 05 UT 06 UT

Flux dropout prior to dipolarization. Substorm Onset: GOES 10 and 13 Magnetic Field and GOES 13 Electron Pitch Angle Flux dropout prior to dipolarization. Multiple intensifications. Field-aligned, 0 deg pitch angles appear first and perpendicular 90 deg pitch angles later. 75 nT Hp GOES 10 GOES 13 25 nT 1800 00