Current Epoch: Epoch 08
Start: 10 Oct 2018 (day 283) 00:00:00 | End: 26 Aug 2020 (Day 239) 19:25:23
Active Release: R04 & R05
P1_R05 is the current version. R04 products will be available until all R05 products have been released.
1B-CPR
Product Availability: Full mission availability except for anomalies and maneuver data gaps.
1B-CPR measures the backscattered power as a function of distance from the radar. The backscattered power is sampled every ~240 m; there are 125 range bins, for a total window of 30 km. The raw, Level 0 data is converted to calibrated Level 1B data using pre-launch and in-flight calibration measurements.
Primary Publication(s)
Process Description and Interface Control Document (PDICD)
Data Issues (Updated October 17, 2007)PDICD (Updated June 27, 2007)
Algorithm Specifications (for latest R05)
Geolocation Fields
Field | Type | Dimensions | Units | Valid Range | Missing | Missing Op. | Factor | Offset |
---|---|---|---|---|---|---|---|---|
Profile_time | FLOAT32 | nray | seconds | [0.0, 6000.0] | 1.0 | 0.0 | ||
UTC_start | FLOAT32 | scalar | seconds | [0.0, 86400.0] | 1.0 | 0.0 | ||
TAI_start | FLOAT64 | scalar | seconds | [0.0, 600000000.0] | 1.0 | 0.0 | ||
Latitude | FLOAT32 | nray | degrees | [-90.0, 90.0] | 1.0 | 0.0 | ||
Longitude | FLOAT32 | nray | degrees | [-180.0, 180.0] | 1.0 | 0.0 | ||
Range_to_intercept | FLOAT32 | nray | km | [600.0, 800.0] | 1.0 | 0.0 | ||
DEM_elevation | INT16 | nray | meters | [-9999, 8850] | 9999 | == | 1.0 | 0.0 |
DEM_geoid_anomaly | FLOAT32 | nray | km | [-1.10e-01, 9.00e-02] | 1.0 | 0.0 | ||
Range_to_first_bin | FLOAT32 | nray | meters | [650000.0, 740000.0] | -9999.0 | == | 1.0 | 0.0 |
RayHeader_RangeBinSize | FLOAT32 | scalar | meters | [2.40e+02, 2.40e+02] | -9999.0 | == | 1.0 | 0.0 |
Pitch_offset | FLOAT32 | scalar | degrees | [-90.0, 90.0] | 1.0 | 0.0 | ||
Roll_offset | FLOAT32 | scalar | degrees | [-90.0, 90.0] | 1.0 | 0.0 |
Data Fields
Field | Type | Dimensions | Units | Valid Range | Missing | Missing Op. | Factor | Offset |
---|---|---|---|---|---|---|---|---|
NoiseFloorPowers | FLOAT32 | nbin,nray | 87 | [1.00e-15, 2.00e-14] | -9999.0 | == | 1.0 | 0.0 |
ReceivedEchoPowers | FLOAT32 | nbin,nray | 87 | [1.00e-15, 1.00e-06] | -9999.0 | == | 1.0 | 0.0 |
FlatSurfaceClutter | FLOAT32 | nbin,nray | 87 | 1.00e-30 | == | 1.0 | 0.0 | |
Data_quality | UINT8 | nray | -- | [0, 255] | 1.0 | 0.0 | ||
Data_status | UINT16 | nray | -- | [0, 65535] | 1.0 | 0.0 | ||
Data_targetID | UINT8 | nray | -- | [0, 255] | 1.0 | 0.0 | ||
Navigation_land_sea_flag | UINT8 | nray | -- | [1, 4] | 1.0 | 0.0 | ||
RayHeader_lambda | FLOAT32 | scalar | meters | [3.19e-03, 3.19e-03] | 1.0 | 0.0 | ||
RayHeader_SpatAvg | FLOAT32 | scalar | seconds | [1.60e-01, 4.80e-01] | -9999.0 | == | 1.0 | 0.0 |
RayHeader_CalVers | FLOAT32 | scalar | -- | [0.0, 5.0] | 1.0 | 0.0 | ||
RayStatus_validity | UINT8 | nray | -- | [0, 255] | 1.0 | 0.0 | ||
RayStatus_PRI | UINT8 | nray | 1.6 microsec | [140, 208] | 0 | == | 1.0 | 0.0 |
RayStatus_pulseWidth | UINT8 | nray | microsec | [3, 3] | 0 | == | 1.0 | 0.0 |
RayStatus_pulsesTx | INT16 | nray | -- | [580, 678] | 0 | == | 1.0 | 0.0 |
RayStatus_antennaNoise | FLOAT32 | nray | mW | 1.0 | 0.0 | |||
TransmitPower | FLOAT32 | nray | 87 | [700.0, 2100.0] | -9999.0 | == | 1.0 | 0.0 |
TransmitPower_Avg | FLOAT32 | scalar | 87 | [700.0, 2100.0] | -9999.0 | == | 1.0 | 0.0 |
RadarCoefficient | FLOAT32 | nray | m^(-3) | [1.00e-02, 1.00e-01] | -9999.0 | == | 1.0 | 0.0 |
Sigma-Zero | INT16 | nray | dB*100 | [-1000, 4000] | -9999 | == | 1.0 | 0.0 |
SurfaceBinNumber | UINT8 | nray | -- | [82, 125] | 255 | == | 1.0 | 0.0 |
SurfaceClutter_Index | FLOAT32 | nray | 99.0 | == | 1.0 | 0.0 | ||
SurfaceBinNumber_Fraction | FLOAT32 | nray | -99.0 | == | 1.0 | 0.0 |