LRO Mini-RF PDS4 Bistatic Calibrated Data (BSRDR4)

BSRDR4 – PDS4 Bistatic Calibrated Data

PDS3 Data Set ID: LRO-L-MRFLRO-2/3/5-BISTATIC-V3.0DOI: 10.17189/1520653Citations of DOI: 10.17189/1520653

PDS4 Bundle:urn:nasa:pds:lro_minirf_bistaticDOI: 10.17189/c3ym-tk17

For more information about Bistatic calibrated RDR data products, see the Mini-RF SAR Bistatic PDS Data Product Software Interface Specification.

The Mini-RF (MRFLRO) Bistatic calibrated data product (BSRDR) contains the calibrated science data product and housekeeping data calibrated to engineering units.

Calibrated science data: Two Raw Bistatic SAR calibrated data products are generated for each Bistatic collect. One data product contains the real and imaginary portions of the complex number representing the vertical polarized backscattered signal. Another data product contains the real and imaginary portions of the complex number representing the horizontal polarized backscattered signal. The real and imaginary components are stored as a PDS4 Array_3D_Image where each element is a 32-bit L SB floating point number. The elements are written to the data file in sample interleaved by pixel. Thus, the first 4 bytes correspond to the real component of the pixel at 0,0, the next 4 bytes correspond to the imaginary component of the pixel at 0,0 the next 4 bytes represent the real component of the pixel at 0,1, and so on.

Calibrated Housekeeping hskcal data : The data fields in the hskraw data product are converted to engineering units by the processor and written to a fixed-width binary data table. Table 5-4 of the Mini-RF SAR Bistatic PDS Data Product Software Interface Specification shows the data format and units.

MRFLRO BSRDR4 products have the following file names:

Mini-RF Bistatic science data products

lfm_yyyydoyhhmmss_<type>{c}_ppdqqq_Vv.ext (with detached PDS label)

Mini-RF Bistatic calibration and engineering data

lfm_yyyydoyhhmmss_<type>{C}_vV.ext (with detached PDS label)

where:

l = LRO

f= Frequency band

S = S-band

X = X-band

m = operational mode(T=bistatic, ground-based transmitter)

yyyydoyhhmmss = Time of data file start in UTC

yyyy = year

doy = day of year

hh = two digit hour of day

mm = two digit minutes of hour

ss = two digit seconds of minute

<type> = type of data file

For science data products

caln = internal noise calibration

calt = internal tone calibration

calc = internal chirp calibration

bitl = internal transmitter bit leak calibration

eng = 12-bit, unencoded, engineering collection

hskraw = raw, DN-valued housekeeping status telemetry

hskcal = calibrated to engineering units housekeeping status telemetry

For calibration and engineering data

sciraw = unprocessed receiver time series data (raw, not map projected)

scip = receiver processed into an image (calibrated)

s1- s4: derived Stokes parameters (derived)

cpr = circular polarization ratio (derived)

ddr= derived geometry and timing data formatted as image backplanes (derived)

{C} = Receiver channel

For science data products This is only for sciraw and scip data types (raw and calibrated science data)

For calibration and engineering dataThis is for all products other than hskraw and hskcal (housekeeping data is not attributed to a specific receiver channel)

h = H-channel

v = V-channel

pp = reference latitude of the map projection to the nearest whole degree. range: 00-90

d = hemisphere of reference latitude. "n" northern hemisphere, "s" southern hemisphere

qqq = reference longitude of the map projection to the nearest whole degree. range: 000-359

v = hardcoded character

V = integer indicating the version of the PDS4 data product. Initial versions start at 1. Version is incremented by 1 for previously delivered products that are redelivered to PDS.

ext = the file extension

dat = binary table files

xml = PDS4 XML labels

img = binary image files

In ODE, BSRDR4 products have the following product IDs:

LFM_YYYYDOYHHMMSS_<type>{C}_PPDQQQ_vV for science data products

LFM_YYYYDOYHHMMSS_<type>{C}_vV for calibration and engineering data