| 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 | instrument_mode |
| binary uint16 | size: 2 |
|---|
|
Instrument mode
|
|
| 9 | time_code |
| binary int64 | size: 5 |
|---|
|
Time Code. Free-running 65535Hz
|
|
| 10 | spare_0 |
| binary bytes | size: 1 |
|---|
|
spare
|
hidden: true
|
| 11 | mode_packet_count |
| binary int64 | size: 3 |
|---|
|
Mode Packet Count
|
|
| 12 | antenna_beam_set_number |
| binary uint8 | size: 0:6 |
|---|
|
Antenna Beam Set number. Characterised prior to launch
|
|
| 13 | compression_ratio |
| binary uint8 | size: 0:2 |
|---|
|
Compression Ratio
|
|
| 14 | echo_flag |
| binary uint8 | size: 0:1 |
|---|
|
Echo Flag. True if Echo data
|
|
| 15 | noise_flag |
| binary uint8 | size: 0:1 |
|---|
|
Noise Flag. True if Noise data
|
|
| 16 | cal_flag |
| binary uint8 | size: 0:1 |
|---|
|
Cal Flag. True if Calibration data
|
|
| 17 | cal_type |
| binary uint8 | size: 0:1 |
|---|
|
Cal Flag. True if Periodic Cal data
|
|
| 18 | cycle_packet_count |
| binary uint16 | size: 1:4 |
|---|
|
Cycle Packet Count
|
|
| 19 | pri |
| binary uint16 | size: 2 |
|---|
|
Pulse Repetition Interval. PRI * RadarSamplingRate
|
|
| 20 | window_start_time |
| binary uint16 | size: 2 |
|---|
|
Window Start Time. Windowtime * RadarSamplingRate
|
|
| 21 | window_length |
| binary uint16 | size: 2 |
|---|
|
Window Length. Windowlength * RadarSamplingRate
|
|
| 22 | upconverter_level |
| binary uint8 | size: 0:4 |
|---|
|
Upconverter Level. 2 * Gain (dB)
|
|
| 23 | downconverter_level |
| binary uint8 | size: 0:5 |
|---|
|
Downconverter Level. 1 * Gain (dB)
|
|
| 24 | tx_pol |
| binary uint8 | size: 0:1 |
|---|
|
Tx Polarisation. True if Vertical
|
|
| 25 | rx_pol |
| binary uint8 | size: 0:1 |
|---|
|
Rx Polarisation. True if Vertical
|
|
| 26 | cal_row_number |
| binary uint8 | size: 0:5 |
|---|
|
Calibration Row number. Used during Periodic Cal
|
|
| 27 | tx_pulse_length |
| binary uint16 | size: 1:2 |
|---|
|
Tx Pulse Length. Pulselength * RadarSamplingRate
|
|
| 28 | beam_adjustment_delta |
| binary uint8 | size: 0:6 |
|---|
|
Beam Adjustment Delta. delta * 4096 / 360 + 32
|
|
| 29 | chirp_pulse_bw |
| binary uint8 | size: 1 |
|---|
|
Chirp Pulse Bandwidth. BW * 255 / 16E6
|
|
| 30 | aux_tx_mon_level |
| binary uint8 | size: 1 |
|---|
|
Auxiliary Tx Monitor Level
|
|
| 31 | resampling_factor |
| binary uint16 | size: 2 |
|---|
|
Resampling factor. values 1 to 64 are valid
|
|
| 32 | source_packet |
| binary bytes |
|---|
Downlinked source packet
bit size: 8 * (int(../isp_length) + 1 - 30)
|
|