Transcript NOAA Satellite and Information Service GOES Overview

NOAA Satellite and Information Service
GOES Constellation Status
Chris Wheeler
GOES Team Lead
Office of Satellite Operations
National Environmental Satellite, Data, and Information Service
Agenda
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GOES On-Orbit Configuration
On-Orbit Configuration
GOES Spacecraft Overview
GOES Spacecraft Status
GOES-10 Decommission Plan
GOES East Transition
Imager Stray Light Effects
GVAR Changes for GOES-14 and GOES-15
GOES On-Orbit Configuration
Current as of 11/2/09
GOES-10
GOES-11
GOES-12
GOES-13
GOES-14
Launched: 4/1997
Launched: 5/2000
Launched: 7/2001
Launched: 5/2006
Located: 60°W
Located: 135°W
Located: 75°W
Located: 105°W
Launched: 6/2009
Located: 89.5°W
South America
GOES-WEST
GOES-EAST
SPARE
Post-Launch
Test
GOES Spacecraft Overview
GOES I-M Series:
Built by Space Systems / Loral in Palo
Alto, CA
Based on Loral 1300 bus series
Design Life: 5yrs
GOES N-P Series:
Built by Boeing Satellite Systems in El
Segundo, CA
Based on Boeing 601 series
Design Life: 10yrs (bus) / 5yrs (instruments)
Key Differences between GOES I-M and GOES N-P
GOES I-M
GOES N-P
Enhancement
Earth Sensor
Attitude
Determination
Star Tracker Attitude
Determination
•Star Trackers more accurate, less noisy,
not immune to diurnal/seasonal thermal
variations
•Simplifies INR Operations, reduces image
outage times
•Improved INR performance
Includes Solar Sail
Eliminates Solar Sail
•Elimination of solar sail reduces
instrument cooler backloading
•Improves detector performance
Ground-based
image schedule
Flight-based image
schedule
•On-board schedule protects against
intermittent uplink outages
Analog WEFAX
Digital LRIT
•Analog to digital conversion
2 x 12 Amp-hour,
NiCd batteries
123 Ah NiMH battery
•GOES N-P design supports full operations
during eclipse
GOES Spacecraft Status
GOES-10
GOES-11
GOES-12
GOES-13
GOES-14
(South America)
(West)
(East)
(Standby)
(Test)
Imager
G
G
G
G
G
Sounder
R
G
G
G
G
Energetic Particle Sensor (EPS)
Y
G
Y
G
G
Magnetometers
G
G
G
G
G
High Energy Proton and Alpha
Detector
G
G
G
G
G
X-Ray Sensor (XRS)
G
R
R
R
G
N/A
N/A
R
Y
G
Telemetry, Command & Control
G
S/C
G
G
G
Attitude and Orbit Control
G
G
G
G
G
Inclination Control
R
G
G
G
G
Propulsion
G
G
Y
S/C
G
S/C
G
G
G
G
Electrical Power
G
Y
G
G
G
Thermal Control
G
G
G
G
G
S/C
S/C
G
G
G
Payload Instrument
Solar X-Ray Imager (SXI)
Spacecraft Subsystems
Mechanisms
Communications Payloads
GOES-O/14 Status
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Launched June 27, 2009
Currently in on-orbit test at 89.5°W
All systems operating nominally
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MAGPD Telescope 5 noisy detector
Drift to 105°W planned for 11/4/09 – 11/20/09
NOAA Science Test planned for 11/30/09 – 1/4/10
Plan to continue operating XRS while in earthpointed “storage”
GOES-N/13 Status
Launch Date: May 24, 2006
Orbital Location: 105°W longitude
Designation: On-Orbit Spare
Solar X-Ray Imager CCD detector partial
damage during X9 solar flare and cosmic
particle hit.
N2 thruster anomalous thrust level.
Thruster use restricted. No user impact.
XRS capacitor short
GOES-M/12 Status
Launch Date: July 23, 2001
Orbital Location: 75°W longitude
Designation: Operational East
Energetic Particle Sensor (EPS) channels
noisy.
X-ray positioner electronics failed. XRS
cannot track Sun.
Solar X-Ray Imager high voltage power
supply failed.
Thruster 2B oxidizer valve leak. “B” side
thrusters isolated.
GOES-L/11 Status
Launch Date: May 3, 2000
Orbital Location: 135°W longitude
Designation: Operational West
X-ray positioner electronics failed. XRS
cannot track Sun.
Reduced battery 1 capacity. Potential impact to
user services during eclipse
Imager/Sounder primary sensor data transmitter
failed. Switched to redundant transmitter
Command receiver B failed; Receiver A
operating nominally
GOES-K/10 Status
Launch Date: April 25, 1997
Orbital Location: 60°W longitude
Designation: Operational Atlantic/South America
Sounder Filter Wheel stalled
Energetic Particle Sensor (EPS) channels
noisy.
No fuel remaining for stationkeeping
Solar array forward mode failed. Spacecraft
Inverted and solar array run in reverse.
Data Collection Platform Interrogate (DCPI)
Primary transmitter failed. Switched to
Redundant transmitter.
GOES-10 Decommission Plan
• GOES-10 has reached end of fuel life
– Remaining fuel reserved for de-orbit maneuvers
• De-commission activities scheduled for December 1-2, 2009
• GOES-10 instruments and communication services will be deactivated Dec. 1 at approx. 12:30z (7:30am EST)
– Dedicated South America imaging operations will be interrupted
• Series of maneuvers will be performed to boost GOES-10 300km
above geosynchronous orbit
• De-commission objectives:
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Boost orbit 300km above geosynchronous altitude
Deplete remaining fuel
Power off electro-mechanical systems
Disable battery charging
Turn off all transmitters to prevent RF interference
• Following decommission, GOES-10 is not recoverable
South America Coverage
• NOAA/NESDIS operating GOES-10 at 60 degrees West since
December 2006.
– Provides continuous GOES coverage of South America during GOES
EAST rapid scan operations.
– Positive impact to South American severe storm and flash flood forecast
and warnings.
• GOES-10 at end of fuel life and must be de-orbited.
• NOAA has received requests to continue South American
support through multiple international organizations.
• NESDIS recommendation to utilize GOES-12 for South America
coverage by June 2010
– Can provide dedicated South America coverage in time for the North
Atlantic hurricane season
– GOES-12 east-west fuel available for 3 years of operation
• No fuel remaining for inclination control
– Awaiting approval from NOAA Headquarters
Proposed GOES East Transition
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GOES-13 replaces GOES-12 in April 2010
– Minimum impact to GOES constellation fly-out scenarios
– Goal is to complete transition prior to 2010 hurricane season
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Similar sequence to GOES-8/12 transition
– Provides significant test period for OSDPD and direct users to evaluate
ingest systems
– Does not require users to re-point antenna systems during drift period
– Incorporates a single GVAR switch from GOES-12 to GOES-13
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If approved, GOES-12 would be available for South America coverage
beginning in May 2010
GOES-13 Return to Normal
Mode (1/19)
GOES-13 North-South
Maneuver (2/9)
GOES-12 drift start (4/27)
GOES-13 drift stop; GOES13 GVAR relayed through
GOES-13 (4/26)
GOES-13 Drift Start (2/23)
GOES-12 drift stop (5/17)
GOES-12 Drift
from 75 to 60
GOES-13 Drift from 105 to 75
1/19
1/26
2/2
2/9
2/16
2/23
3/2
3/9
3/16
3/23
3/30
4/6
4/13
Activate GOES-13 SXI/MDL
(3/8)
GOES-13 Operations
GOES-13 becomes GOESReadiness Review (2/17)
East; GOES-13 GVAR
Begin GOES-13 execution of
relayed through GOES-12
GOES East Schedule (1/25)
(4/14)
4/20
4/27
5/4
5/11
Begin GOES-12 execution of
South America Schedule
(5/11)
GOES East Transition Timeline
1/19
GOES-13 Return to Normal Mode
Imager, Sounder, SEM activated
SXI remains off
1/21
1/25
2/9
2/17
2/23
3/8
4/14
Image Navigation Start-up (4 days)
Begin GOES-13 execution of GOES East Schedule
Perform GOES-13 Annual inclination maneuver
Conduct GOES-13 Operations Readiness Review
Start GOES-13 Eastward Drift from 105°W to 75°W
Near 99°W; Activate GOES-13 SXI/MDL
Near 81°W; GOES-13 becomes GOES-East
Stop GOES-12 GVAR
GOES-13 GVAR relayed through GOES-12
Users do not re-point antenna
4/26
Stop GOES-13 Drift at 75°W
GOES-13 GVAR relayed through GOES-13
Switch ancillary COMM services from GOES-12 to GOES-13
Imager Stray Light Effects
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GOES I-M series instruments had a solar
keep-out-zone restriction when the sun
was < 7° from scan frame
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Imager/Sounder frames cancelled to prevent
overheating of the secondary mirror
assemblies
GOES N-P instrument modifications eliminate
solar keep-out-zone effects
GOES N-P design allows for continuous
imaging operations through eclipse
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Verified through post-launch testing and
GOES-13 operational periods
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However…..
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Solar stray light contamination is
observed when the sun is <10-15 degrees
from the image frame.
Comparative tests performed on GOES
11-13 in April 2009 show that stray light
performance is the same for GOES 11-13
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Subsequent testing on GOES-14 during Fall
2009 eclipse season show similar
performance on GOES-14
Imager Stray Light Mitigation
Options include:
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Take all images regardless of Sun
position. Let users decide which images
to use
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Re-introduces keep-out-zone
Results in a lot of frame cancellations
Undesirable
Scan away from the Sun
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4.
Considered undesirable
Cancel image when the Sun is close to
the frame boundary
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3.
Why not scan away from contaminated data?
Scan partial or shifted frames
Short-term approach
Apply an L1b algorithmic correction to
remove stray light prior to GVAR
broadcast
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NASA/NOAA/ITT study underway
Long-Term approach
See poster presentation
for more info
Original Image
Corrected Image
GVAR Changes for GOES-O/P
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Background
– GOES-O/P Imagers have additional 8th IR detector
– Imager factory coefficients (including instrument nadir positions) previously
copied from Block 0 to Block 11 for GOES-12 and beyond
– Beginning with GOES-O, factory coefficients were removed from Block 0.
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Issues
– Instrument offsets are important for image navigation
– Block 11 is transmitted infrequently
– User ingest systems were not updated to reflect GVAR changes
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Resolution
– Instrument offsets are being copied back to previously spare locations in Block 0
– Effective early November 2009
GOES Calibration Information
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GOES Calibration Website
http://www.oso.noaa.gov/goes/goes-calibration/index.htm
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For Imagers and Sounders of current and previous operational satellites,
contains up-to-date (from instrument developer)
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Calibration parameters, and
Spectral response functions
Recent update for GOES-13 Imager channel-6 Spectral response functions
o A shifted and current operational version approved by NOAA/NESDIS Calibration
Oversight Panel (CalPOP)
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Recent addition
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GOES-O calibration parameters and spectral response functions
Pending addition
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GOES-P calibration parameters and spectral response functions