MGN RDRS Full-Resolution Mosaicked Image Data Record (FMIDR)

FMIDR – Full-Resolution Mosaicked Image Data Record

PDS3 Data Set ID: MGN-V-RDRS-5-MIDR-FULL-RES-V1.0DOI: 10.17189/1522523Citations of DOI: 10.17189/1522523

PDS4 Bundle: urn:nasa:pds:magellan_midrDOI: 10.17189/5ktn-9j71

For more information about RDRS MIDR products, see the Magellan MIDR User's Guide for the PDS4 Dataset, and the FMIDR Data Set Description for the PDS3 FMIDR products.

The Radar System (RDRS) Full-Resolution Mosaicked Image Data Records (FMIDRs) contain synthetic aperture radar (SAR) mosaics generated from Full-Resolution Basic Image Data Records (FBIDRs) (i.e. with 75 meters/pixel). Each FMIDR is in a sinusoidal equal area projection and has an origin at 0 degrees latitude, with the central meridian defined as the longitude bisecting the mosaic. Each FMIDR has 7168 lines (aligned with latitude) by 8192 samples, arranged as 1024 x 1024 files. FMIDRs have been generated for key terrains on the planet, regions where highest spatial resolution is required for analysis. The new PDS4 migrated FMIDR archive contains the same data as the original PDS3 archive, but with the multiple small framelets of each product put together into a single mosaic. The updated archive also has contrast-enhanced and easier to display browse products stored as JPEG files, along with improved metadata in the MIDR PDS4 labels. For a more comprehensive understanding of this dataset and its improvements, please see the Magellan MIDR User's Guide for the PDS4 Dataset.

In ODE, FMIDR products, which include the files in the table below, have one of the following product IDs:

fmidr_xxpwww_v (first mapping cycle, v = 1-digit version number)

fmidr_xxpwww_nvv (following cycles, n = cycle number, vv = 2-digit version number)

where:

xx = 2-digit number denoting the center latitude of the image

p = either N or S depending on the image's position relative to the equator

www = 3-digit number denoting the center longitude of the image

For each migrated PDS4 FMIDR data product in ODE's data product search result page, it is linked to the following files appear with their corresponding PDS3 label files, including the ancillary data and framelets that make up a single 7168 line by 8192 sample mosaic.

File Name	File Content
browse.img	The browse version of the FMIDR, 896 lines by 1024 samples, created by averaging groups of 8 x 8 pixels in the original FMIDR.
frame.tab	A table describing the range of latitude and longitude within each framelet.
geom.tab	Selected entries from the Magellan Experimenter’s Notebook. The Notebook is generated from the Magellan Radar Mapping Sequencing Software and is based on predicted information. Information is included in GEOM.TAB on orbit numbers for which data were acquired and used in a given file, together with information on radar viewing geometry and image quality.
hist.tab	A binary histogram of pixel values in each 8192 x 7168 FMIDR.
ffnn.img	A 1024 x 1024 image framelet, where ‘nn’ is the framelet number (01-56).

In PDS3 archives, all of the MIDR products (F, C1, C2, and C3) appear in the same PDS directory. FMIDR products occur in 77 of the subdirectories found at the data set link above for a total of 765 products. The subdirectories containing FMIDR products are in the table below (from left to right):

mg_0001	mg_0003	mg_0004	mg_0005	mg_0006	mg_0007	mg_0008	mg_0009
mg_0010	mg_0011	mg_0013	mg_0015	mg_0017	mg_0018	mg_0023	mg_0024
mg_0025	mg_0026	mg_0027	mg_0028	mg_0029	mg_0032	mg_0035	mg_0036
mg_0038	mg_0039	mg_0042	mg_0044	mg_0045	mg_0046	mg_0049	mg_0050
mg_0052	mg_0053	mg_0055	mg_0056	mg_0058	mg_0059	mg_0062	mg_0063
mg_0064	mg_0065	mg_0066	mg_0067	mg_0068	mg_0070	mg_0071	mg_0072
mg_0073	mg_0074	mg_0075	mg_0076	mg_0077	mg_0080	mg_0086	mg_0087
mg_0093	mg_0094	mg_0098	mg_0101	mg_0102	mg_0103	mg_0104	mg_0105
mg_0106	mg_0107	mg_0108	mg_0109	mg_0110	mg_0111	mg_0119	mg_0120
mg_0121	mg_0122	mg_0123	mg_0124	mg_0125