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- 02a50e11-e6ee-4b05-a157-32cf57a74adf type Concept @default.
- 02a50e11-e6ee-4b05-a157-32cf57a74adf broader 47d0c7c0-683c-42a9-b53b-53b684972b52 @default.
- 02a50e11-e6ee-4b05-a157-32cf57a74adf definition "Path = ['GPS', 'Positioning/Navigation', 'Passive Remote Sensing', 'Earth Remote Sensing Instruments', 'Instruments'] GAP (GPS Attitude and Positioning Experiment) instrument objective is to measure S/C velocity and attitude as well as TEC (Total Electron Content) of the ionosphere. The relative phase delay of signals in both the L1 and L2 bands from a GPS satellite occulted by the limb ionosphere provide large-scale (1000's of km) information on how the total electron content responds to magnetospheric perturbations. GAP consists of two components: - GAP-A: Three single-frequency (L1) GPS receivers and four patch antennas. This package is being used to provide an accurate absolute time reference, spacecraft 3-D attitude, and post-processed spacecraft position and velocity. - GAP-O: The objective is to provide ionospheric tomography observations." @default.
- 02a50e11-e6ee-4b05-a157-32cf57a74adf inScheme concept_scheme @default.
- 02a50e11-e6ee-4b05-a157-32cf57a74adf prefLabel "GAP" @default.