1. 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.

2. 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.

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

4. 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

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

6. 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

7. NOAA’s National Geophysical Data Center
GOES 8-12 Data Provided to
NOAA’s National Geophysical Data Center
Data included in the 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.

8. Backup on GOES 13
GOES 13, O, P

9. GOES 13 Magnetometer Specifications
Instrument Manufacturer
SAIC/Nanotesla
Satellite Manufacturer
Boeing (3-axis stabilized)
Sample Rate
1 sample / 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

10. 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

11. GOES 10, 12, 13 Magnetic Field Comparison October 13, 2006
GOES deg
GOES deg
GOES 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 deg GOES deg

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

13. Magnetic Substorm Signatures at Geosynchronous OrbitP
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

14. 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