Predicting Ionospheric Densities and Scintillation with the Communication / Navigation Outage...
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Predicting Ionospheric Densities and Scintillation with the Communication / Navigation Outage Forecasting System
(C/NOFS) Mission
Chin S. Lin1, O. de La Beaujardière2, J. Retterer2
1 Boston College, MA 2 Air Force Research Laboratory, Space Vehicle Directorate,
Hanscom AFB, MA
Second GPS RO Data Users’ workshop
August 2005
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Outline
– Communication/NavigationOutage Forecasting System (C/NOFS) will provide ionosphere and scintillation forecasts
– Motivation for this paper:
• Perform pre-launch validation of models and algorithms that will be used during the C/NOFS satellite mission
• Analysis of DMSP and ROCSAT-1 satellite data prior to C/NOFS launch have improved our ability to forecast ionosphere, especially during magnetic storms
• Collaborative studies of Formosat-3/COSMIC and C/NOFS data will be very useful
The C/NOFS Satellite: 130 orbit,
375x710 km alt, 06 launch
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Introduction
C/NOFSFirst satellite to provide continuous, global ambient ionosphere and scintillation forecasts
Mission elements• Satellite• Ground-based
instruments• Models• Data center
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The C/NOFS Satellite
+Y
-Z
+X
VEFI Trigger Probe
CERTO Antenna
VEFI Booms (6)(Shown Truncated)
Zenith ground link Tx and Receive Patch Antennas
Real time Antennas
(7, Yellow)
VEFI Magnetometer
Ram Plate w/ detectors
Double Flip Down Deployable Solar Arrays (8)
338.6 cm(133.3”)
Star Trackers
Image provided by General Dynamics C4 Systems, Spectrum Astro Space Systems
VEFI Mag
CERTO
VEFI booms
CINDI, PLP
• C/NOFS will fly vertically, the ram plate in the forward direction
• 6 Instruments:
– CORRIS: GPS receiver
– VEFI: Electric & Mag Field
– CINDI: Ion Velocity Meter (IVM ) + Neutral Wind Meter (NWM)
– CERTO: Beacon Tx)
– PLP: Plasma Langmuir Probe
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Concluding Remarks
• C/NOFS is first-ever system for continuous global scintillation forecasts
• Campaigns, ground and satellite support are essential
• C/NOFS data will be not be restricted ( ask [email protected] for password)
• C/NOFS observations could improve understanding of occurrence and structures of equatorial plasma bubbles
• Collaborative studies of Formosat-3/COSMIC and C/NOFS satellite data are welcome
• NASA and NSF have set aside funds for scientific investigation with C/NOFS
Satellite System
Ground-Based Sensors
Forecast Modeling
Prototype Map