|
|
|
**Overview**
|
|
|
|
|
|
|
|
MAPIES supports Visible Infrared Imaging Radiometer Suite (VIIRS) data processing. VIIRS provides observations related to aerosols, like Aerosol Optical Thickness (AOT).
|
|
|
|
|
|
|
|
**Configuration**
|
|
|
|
|
|
|
|
VIIRS settings are stored in `satellite_config.yaml`, where key variables include:
|
|
|
|
|
|
|
|
```
|
|
|
|
viirs:
|
|
|
|
variables:
|
|
|
|
time_variable: "Scan_Start_Time"
|
|
|
|
lon_variable: "Longitude"
|
|
|
|
lat_variable: "Latitude"
|
|
|
|
obs_variable: "Aerosol_Optical_Thickness_550_Land_Ocean_Best_Estimate"
|
|
|
|
qa:
|
|
|
|
qa_variables:
|
|
|
|
qa_land:
|
|
|
|
qa_name: "Aerosol_Optical_Thickness_QA_Flag_Land"
|
|
|
|
qa_values: [2,3]
|
|
|
|
qa_ocean:
|
|
|
|
qa_name: "Aerosol_Optical_Thickness_QA_Flag_Ocean"
|
|
|
|
qa_values: [3]
|
|
|
|
```
|
|
|
|
|
|
|
|
**Running VIIRS Processing**
|
|
|
|
|
|
|
|
To process VIIRS data, use the script `run_viirs.py`([run_viirs.py]()).
|
|
|
|
|
|
|
|
**Available Features**
|
|
|
|
|
|
|
|
- Reading and filtering VIIRS NetCDF files.
|
|
|
|
- Applying QA flags to specify the desired quality of the observations.
|
|
|
|
- Geospatial cropping to process data for specific regions.
|
|
|
|
- Regridding and spatial aggregation (supports regular and rotated grids).
|
|
|
|
- Time averaging.
|
|
|
|
- 2D visualization of processed data.
|
|
|
|
|
|
|
|
**Output Format**
|
|
|
|
|
|
|
|
Processed and unprocessed VIIRS data is stored in NetCDF files, including:
|
|
|
|
|
|
|
|
```
|
|
|
|
<xarray.Dataset> Size: 4MB
|
|
|
|
Dimensions: (time: 222081)
|
|
|
|
Coordinates:
|
|
|
|
* time (time) datetime64[ns] 2MB 2024-01-01T00:38:24 ... 2024-01-01T23:...
|
|
|
|
Data variables:
|
|
|
|
lon (time) float32 888kB ...
|
|
|
|
lat (time) float32 888kB ...
|
|
|
|
aod550 (time) float32 888kB ...
|
|
|
|
Attributes:
|
|
|
|
title: VIIRS data from 2024-01-01 00:30:00 to 2024-01-01 23:59:00
|
|
|
|
institution: Barcelona Supercomputing Center
|
|
|
|
grid: rotated: {"centre_lat": 35, "centre_lon": 20, "west": -51, ...
|
|
|
|
Developers: MAPIES team
|
|
|
|
QA: Quality Assurance: True, quality assurance applied: {"qa_la...
|
|
|
|
history: Created 2025-02-21 13:37:21.338330
|
|
|
|
```
|
|
|
|
|
|
|
|
**Visualization**
|
|
|
|
|
|
|
|
To generate a 2D map of VIIRS observations or of the number of valid observations. |
|
|
\ No newline at end of file |
