Concept information
Preferred term
GAP
Definition
- 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. (en)
Broader concept
- GPS (en)
URI
https://earth.esa.int/concept/8b3263f8-68d0-5403-bb0c-0b8ee506ca33
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