| id | field name | definition |
|---|
| 0 | dsr_time |
| binary time | size: 12 |
|---|
ISP Sensing 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"
|
|
|
|
|
| 1 | gsrt |
| binary time | size: 12 |
|---|
Ground Station Reference Time of reception
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 | isp_length |
| binary uint16 | size: 2 |
|---|
Length of the ISP = length of the source packet - 7 bytes
unit: "bytes"
|
|
| 3 | crc_errs |
| binary uint16 | size: 2 |
|---|
|
Number of VCDUs in the ISP which contain a CRC error
|
|
| 4 | rs_errs |
| binary uint16 | size: 2 |
|---|
|
Number of VCDUs in the ISP for which a Reed-Solomon error correction was performed
|
|
| 5 | spare_1 |
| binary array[2] | size: 2 |
|---|
Spare (set to zero)
|
hidden: true
|
| 6 | packet_header |
|
| 7 | datafield_header_length |
| binary uint16 | size: 2 |
|---|
|
Data Field Header Length
|
|
| 8 | icu_mode_id |
| binary uint8 | size: 1 |
|---|
|
ICU Mode ID
|
|
| 9 | instr_mode_spare_0 |
| binary bytes | size: 0:3 |
|---|
|
spare
|
hidden: true
|
| 10 | rate |
| binary uint8 | size: 0:1 |
|---|
|
Packet Version Number
|
|
| 11 | mode_activity |
| binary uint8 | size: 0:4 |
|---|
|
Instrument Mode/Activity
|
|
| 12 | icu |
| binary uint32 | size: 4 |
|---|
|
Estimated value for the ICU On-Board Time when the current measurement began.
|
|
| 13 | packet_type_id |
| binary uint8 | size: 0:4 |
|---|
|
Packet Type ID. 0 = no auxiliary data included ; 1 = auxiliary data included, first set in sequence; 2 = auxiliary data included, second set in sequence.
|
|
| 14 | igm_id |
| binary uint16 | size: 2 |
|---|
|
Counter generated by the SPE which is incremented by one for each new IGM at the SPE.
|
|
| 15 | num_blocks |
| binary uint8 | size: 0:4 |
|---|
|
Number of blocks in packet
|
|
| 16 | packet_type_igm_num_blocks_spare_0 |
| binary bytes | size: 1 |
|---|
|
spare
|
hidden: true
|
| 17 | block_info |
| binary array[4] | size: 16 |
|---|
Block Info
| binary record | size: 4 |
|---|
| id | field name | definition |
|---|
| 0 | block_source_id |
| binary uint8 | size: 0:5 |
|---|
|
Source ID for block.
|
|
| 1 | block_seq_nr |
| binary uint16 | size: 1:3 |
|---|
|
Block sequence number for block.
|
|
| 2 | block_num_samples |
| binary uint16 | size: 1:3 |
|---|
|
Number of samples for block
|
|
| 3 | block_bits_per_sample |
| binary uint8 | size: 0:5 |
|---|
|
Bits per sample for this block
|
|
|
|
|
| 18 | aux_fields |
| binary array[dim_0] |
|---|
Auxiliary Header Fields
dim_0: if(int(../packet_type_id) != 0, 1, 0)
| binary record "" | size: 1400 |
|---|
|
|
| 19 | source_packet |
| binary array[dim_0] |
|---|
Downlinked source packet
dim_0: if(int(../packet_type_id) != 0, int(../isp_length) - 1427, int(../isp_length) - 27)
|
|