| id | field name | definition |
|---|
| 0 | grouping_result_id |
| binary uint16 | size: 2 |
|---|
|
a unique id for this group in this L2B file. Each channel has its own sequence of id numbers and both start counting at 1
|
|
| 1 | start_of_obs_datetime |
| binary time | size: 12 |
|---|
Start date and time of Measurement
unit: "s since 2000-01-01"
value: float(./days) * 86400 + float(./seconds) + float(./microseconds) / 1000000
| binary record | size: 12 |
|---|
ENVISAT binary datetime
| id | field name | definition |
|---|
| 0 | days |
| binary int32 | size: 4 |
|---|
days since January 1st, 2000 (may be negative)
unit: "days since 2000-01-01"
|
|
| 1 | seconds |
| binary uint32 | size: 4 |
|---|
seconds since start of day
unit: "s"
|
|
| 2 | microseconds |
| binary uint32 | size: 4 |
|---|
microseconds since start of second
unit: "1e-6 s"
|
|
|
|
|
| 2 | which_l1b_brc1 |
| binary uint16 | size: 2 |
|---|
|
L1B BRC1 number for the measurement at which this group starts
|
|
| 3 | which_l1b_meas_within_this_brc1 |
| binary uint16 | size: 2 |
|---|
|
L1B measurement number within the above mentioned L1B BRC1 at which this group starts
|
|
| 4 | which_l1b_brc2 |
| binary uint16 | size: 2 |
|---|
|
L1B BRC2 number for the measurement at which this group starts
|
|
| 5 | which_l1b_meas_within_this_brc2 |
| binary uint16 | size: 2 |
|---|
|
L1B measurement number within the above mentioned L1B BRC2 at which this group starts
|
|
| 6 | reason_to_end_this_group |
| binary uint8 | size: 1 |
|---|
|
What criterium was used to end this group? 0: only used for internal initialisations, 1: grouping ended because end of L1B file was reached, 2: grouping ended because the vertical misalignment of rangebins between first and last measurement in the group passed the threshold defined in the L2B AuxPar file, 3: grouping ended because the horizontal distance between first and last measurement in the group passed the threshold defined in the L2B AuxPar file, 4: grouping ended because the distance between the first and last missing measurement passed the threshold defined in the L2B AuxPar file
|
|
| 7 | rangebin_causing_group_to_end |
| binary uint8 | size: 1 |
|---|
|
At which rangebin was the misalignment detected? Code 0 signals undefined/unused. Code 25 signals a terrain model shift. This field is only defined if reason to end this group equals rangebin misalignment
|
|
| 8 | spare |
| binary bytes | size: 6 |
|---|
|
Spare
|
hidden: true
|