4.8. 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 profile and surface parameters from ATMS, AMSU-A, and MHS microwave sensor data. For more information on this product, please see the CSPP LEO distribution website.
When executed on Suomi-NPP 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 --fornav-D option is set to 100 and the
--fornav-d option is set to 1.
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
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 |
4.8.1. Command Line Arguments¶
usage: polar2grid.sh mirs <writer> [-h] [--list-products] [--bt-channels]
[-p [PRODUCTS [PRODUCTS ...]]]
4.8.1.1. Frontend Initialization¶
swath extraction initialization options
- --list-products
List available frontend products
Default: False
4.8.1.2. Frontend Swath Extraction¶
swath extraction options
- --bt-channels
Add all BT channels to the list of requested products
Default: False
- -p, --products
Specify frontend products to process
4.8.2. Execution Examples¶
polar2grid.sh mirs gtiff --list-products -f /atms/NPR-MIRS-IMG_v11r1_NPP_s201611111032500_e201611111044016_c201611111121100.nc
polar2grid.sh mirs gtiff -p btemp_23v btemp_183h3 swe -g lcc_fit -f /atms/
polar2grid.sh mirs scmi -p swe tpw sea_ice rain_rate btemp_89v1 --grid-coverage=0 -g merc_pacific_1km --sector-id Pacific --letters --compress -f /noaa18/IMG_SX.NN.D17037.S1358.E1409.B6037373.WE.HR.ORB.nc
polar2grid.sh mirs scmi --bt-channels -g lcc_conus_750 --sector-id LCC --letters --compress -f ../input/NPR-MIRS-IMG_v11r1_NPP_s201611111032500_e201611111044016_c201611111121100.nc
polar2grid.sh mirs hdf5 --add-geolocation -f ../metop/IMG_SX.M1.D17037.S1648.E1700.B0000001.WE.HR.ORB.nc
