4.7. MIRS Reader¶
The MiRS frontend extracts data from files created by the Community Satellite Processing Package (CSPP) direct broadcast version of the NOAA/STAR Microwave integrated Retrieval System (MiRS). The software supports the creation of atmospheric and surface parameters from ATMS, AMSU-A, and MHS microwave sensor data. For more information on this product, please visit the CSPP LEO website: https://cimss.ssec.wisc.edu/cspp/.
When executed on Advanced Technology Microwave Sounder (ATMS) MiRS product files, a limb correction algorithm is applied for brightness temperatures reprojections for each of the 22 spectral bands. The correction software was provided by Kexin Zhang of NOAA STAR, and is applied as part of the MIRS ATMS Polar2Grid execution.
This reader’s default resampling algorithm is ewa for Elliptical Weighted
Averaging resampling. The --weight-delta-max option is set to 100 and the
--weight-distance-max option is set to 1.
The ACSPO output product format is NetCDF4. The frontend can be specified with the polar2grid.sh command using the mirs frontend name.The frontend offers the following products:
Product Name
Description
rain_rate
Rain Rate
sea_ice
Sea Ice in percent
snow_cover
Snow Cover
tpw
Total Precipitable Water
swe
Snow Water Equivalence
clw
Cloud Liquid Water
sfr
Snow Fall Rate
surface_type
Surface Type
tskin
Skin Temperature
btemp_X
Brightness Temperature for channel X (see below)
For specific brightness temperature band products, use the btemp_X option,
where X is a combination of the microwave frequency (integer) and
polarization of the channel. If there is more than one channel at that
frequency and polarization a “count” number is added to the end. To create
output files of all available bands, use the --bt-channels option.
As an example, the ATMS band options are:
Band Number |
Frequency (GHz) |
Polarization |
Polar2Grid Dataset Name |
|---|---|---|---|
1 |
23.79 |
V |
btemp_23v |
2 |
31.40 |
V |
btemp_31v |
3 |
50.30 |
H |
btemp_50h |
4 |
51.76 |
H |
btemp_51h |
5 |
52.80 |
H |
btemp_52h |
6 |
53.59±0.115 |
H |
btemp_53h |
7 |
54.40 |
H |
btemp_54h1 |
8 |
54.94 |
H |
btemp_54h2 |
9 |
55.50 |
H |
btemp_55h |
10 |
57.29 |
H |
btemp_57h1 |
11 |
57.29±2.17 |
H |
btemp_57h2 |
12 |
57.29±0.3222±0.048 |
H |
btemp_57h3 |
13 |
57.29±0.3222±0.022 |
H |
btemp_57h4 |
14 |
57.29±0.3222±0.010 |
H |
btemp_57h5 |
15 |
57.29±0.3222±0.0045 |
H |
btemp_57h6 |
16 |
88.20 |
V |
btemp_88v |
17 |
165.50 |
H |
btemp_165h |
18 |
183.31±7.0 |
H |
btemp_183h1 |
19 |
183.31±4.5 |
H |
btemp_183h2 |
20 |
183.31±3.0 |
H |
btemp_183h3 |
21 |
183.31±1.8 |
H |
btemp_183h4 |
22 |
183.31±1.0 |
H |
btemp_183h5 |
4.7.1. Command Line Arguments¶
usage: polar2grid.sh -r mirs -w <writer> [-h] [--bt-channels] [--limb-correction | --no-limb-correction]
4.7.1.1. MiRS Reader¶
- --bt-channels
Add all bands to list of products
- --limb-correction, --no-limb-correction
Perform limb correction on ATMS instrument BT channels (enabled by default)
Default:
True
4.7.2. Execution Examples¶
polar2grid.sh -r mirs -w geotiff --list-products -f /atms/NPR-MIRS-IMG_v11r8_n20_s202208250741413_e202208250753249_c202208250817490.nc
polar2grid.sh -r mirs -w geotiff --list-products-all -f /atms/NPR-MIRS-IMG_v11r8_npp_s202208250653413_e202208250704529_c202208250730310.nc
polar2grid.sh -r mirs -w geotiff -p btemp_88v btemp_183h3 swe -g lcc_fit -f /atms/
polar2grid.sh -r mirs -w awips_tiled --num-workers 4 --grid-coverage 0 -g merc_pacific_1km --sector-id Pacific --letters --compress -p swe tpw sea_ice rain_rate btemp_89v1 -f /noaa19/NPR-MIRS-IMG_v11r8_n19_s202208250310331_e202208250314143_c202208251718490.nc
polar2grid.sh -r mirs -w awips_tiled --bt-channels -g lcc_conus_750 --sector-id LCC --letters --compress -f ../input/NPR-MIRS-IMG_v11r1_NPP_s201611111032500_e201611111044016_c201611111121100.nc
polar2grid.sh -r mirs -w hdf5 --add-geolocation --dtype float32 -f ../metopc/NPR-MIRS-IMG_v11r8_ma3_s202208251542209_e202208251554261_c202208251742030.nc
