| /gt1r/bckgrd_atlas/bckgrd_int_height: | Array of 32 bit Reals [delta_time = 0..89489] contentType: modelResult coordinates: delta_time description: The height of the altimetric range window. This is the height over which the 50-shot sum is generated. Parameter is ingested at 50-Hz, and values are repeated to form a 200-Hz array. long_name: Altimetric range window width source: ATL03 ATBD Section 7.3 units: meters |
| /gt1r/bckgrd_atlas/delta_time: | Array of 64 bit Reals [delta_time = 0..89489] description: Elapsed GPS Seconds from the ATLAS SDP GPS Epoch, referenced to the start of the 50-shot sum. This is based on every fiftieth laser fire time, which leads to a very close alignment with major frame boundaries (+/- 1 shot). The ATLAS Standard Data Products (SDP) epoch offset is defined within /ancillary_data/atlas_sdp_gps_epoch as the number of GPS seconds between the GPS epoch (1980-01-06T00:00:00.000000Z UTC) and the ATLAS SDP epoch. By adding the offset contained within atlas_sdp_gps_epoch to delta time parameters, the time in gps_seconds relative to the GPS epoch can be computed. long_name: Time at the start of ATLAS 50-shot sum source: ATL02 standard_name: time units: seconds since 2018-01-01 |
| /gt1r/heights/lat_ph: | Array of 64 bit Reals [delta_time = 0..4102520] coordinates: delta_time lon_ph description: Latitude of each received photon. Computed from the ECF Cartesian coordinates of the bounce point. long_name: Latitude source: ATL03g ATBD, Section 3.4 standard_name: latitude units: degrees_north valid_max: 90. valid_min: -90. |
| /gt1r/heights/delta_time: | Array of 64 bit Reals [delta_time = 0..4102520] contentType: referenceInformation coordinates: lat_ph lon_ph description: The transmit time of a given photon, measured in seconds from the ATLAS Standard Data Product Epoch. Note that multiple received photons associated with a single transmit pulse will have the same delta_time. The ATLAS Standard Data Products (SDP) epoch offset is defined within /ancillary_data/atlas_sdp_gps_epoch as the number of GPS seconds between the GPS epoch (1980-01-06T00:00:00.000000Z UTC) and the ATLAS SDP epoch. By adding the offset contained within atlas_sdp_gps_epoch to delta time parameters, the time in gps_seconds relative to the GPS epoch can be computed. long_name: Elapsed GPS seconds source: Operations standard_name: time units: seconds since 2018-01-01 |