| id | field name | definition |
|---|
| 0 | sensing_time |
| binary time | size: 12 |
|---|
ISP Sensing Time. Time of the actual acquisition of the source packet
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"
|
|
|
|
|
| 1 | downlink_time |
| binary time | size: 12 |
|---|
ISP Downlink Time. Time of the downlink on ground of the source packet (G/S time)
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 | packet_length |
| binary uint16 | size: 2 |
|---|
|
ISP Length = (length of source packet excluding 6 bytes) - 1. This field uses the same definition as the Packet Length field of the Packet Header as specified in CCSDS definitions.
|
|
| 3 | num_vcdu |
| binary uint16 | size: 2 |
|---|
|
Number of VCDUs containing current ISP
|
|
| 4 | num_vcdu_rs |
| binary uint16 | size: 2 |
|---|
|
Number of VCDUs containing current ISP that are corrected with Reed-Solomon
|
|
| 5 | num_vcdu_no_rs |
| binary uint16 | size: 2 |
|---|
|
Number of VCDUs containing current ISP that were incorrigible with Reed-Solomon
|
|
| 6 | num_vcdu_missing |
| binary uint16 | size: 2 |
|---|
|
Number of missing VCDUs containing current ISP
|
|
| 7 | num_corr_sym |
| binary uint16 | size: 2 |
|---|
|
Number of symbols corrected by Reed-Solomon in CADUs containing current ISP
|
|
| 8 | crc_flag |
| binary uint8 | size: 1 |
|---|
|
CRC Error Flag, identifying the detection of a CRC error in the packet (set to FF in case of error, otherwise set to 00)
|
|
| 9 | spare |
| binary bytes | size: 3 |
|---|
|
spare
|
hidden: true
|
| 10 | source_packet |
| binary record |
|---|
Instrument Source Packet
| id | field name | definition |
|---|
| 0 | packet_header |
|
| 1 | data |
| binary bytes |
|---|
Data Field Header
bit size: (int(../../packet_length) - 1) * 8
|
|
| 2 | crc |
|
|
|