Nighttime Ground and Space Based Ionospheric Measurements in Support of FORMOSAT- 3/COSMIC

Details Nighttime Ground and Space Based Ionospheric Measurements in Support of FORMOSAT- 3/COSMIC Nighttime Ground and Space Based Ionospheric Measurements in Support of FORMOSAT- 3/COSMIC

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006agufmsa32a..05b&link_type=abstract

American Geophysical Union, Fall Meeting 2006, abstract #SA32A-05

Physics

2400 Ionosphere (6929), 2439 Ionospheric Irregularities, 2494 Instruments And Techniques

Scientific paper

Coordinated multi-technique measurements were conducted in support of COSMIC launched in April 2006. These early measurements were organized to take advantage of the clustering of satellites in the constellation generally referred to as "beads on string" configuration. This configuration only occurs during the early phase when the satellites are around the launch altitude, approximately 500 km, before they are finally deployed at 800 km altitude. This clustered configuration permits measurements with high spatial and temporal resolution from all three COSMIC instruments, namely, the GPS occultation sensor (GOX), the Tiny Ionospheric Photometer (TIP) and the radio beacon. The main advantage of this constellation is that the coverage in latitude and longitude is unprecedented. The TIP observations of nighttime 135.6 nm emission provide the features of the equatorial anomaly, namely the ionization density at the crests, the crest to trough density ratio, the latitude separation of the crests and their asymmetry. The GOX sensor is able to provide accurate electron density profiles in the equatorial anomaly region at dusk by the assimilation of TIP data on density gradients. Major ground-based support was provided by incoherent scatter radars at Jicamarca and Kwajalein, the TEC network in the South American sector and scintillation measurements from nearby SCINDA sites. These early results on large and small-scale plasma structuring in the nighttime equatorial ionosphere will be presented.

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