Supported ENVISAT Products |

## Contains ASAR external characterization data

Fields of ENVISAT ASA_XCH_AX_GADS Records

Index | Identifier | Field Type | Field Length | Description | Units
0 | `"dsr_time"` | MJD | 1 | Time of characterization | MJD
1 | `"dsr_length"` | ULong | 1 | Length of this DSR in bytes | bytes
2 | `"complex_loop_factors"` | Float | 128 | Complex Loop Paths Characterization Factors relative to free space (from External Characterization data). 64 complex (I,Q) values of gnp where n is the index of the row (1 to 32) and p is the index of the polarization (H=1, V=2) (TBC) Arranged H: 1 to 32, then V: 1-32) | -
3 | `"pointing_error"` | Float | 1 | Antenna pointing error DP1 (from External Characterization data) | -
4 | `"spare_1"` | Spare | 1 | Spare | -