generatorzuloo.blogg.se - Abi inform definition

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If you are working with mesoscale sector files, then you will have to use the provided Python function to calculate

Download GOES-West (GOES-18, 137.0 °W) 2km resolution CONUS sector lat/lon file (8.5 MB).

#Abi inform definition full#

Download GOES-West (GOES-18, 137.0 °W) 2km resolution Full Disk sector lat/lon file (59 MB).

Download GOES-East (GOES-16, 75.2 °W) 2km resolution CONUS sector lat/lon file (9 MB).

Download GOES-East (GOES-16, 75.2 °W) 2km resolution Full Disk sector lat/lon file (61.5 MB).

Download these files & extract and save the contents, and then you can simply open the appropriate file and read in the latitude and longitude arrays.įull Disk & CONUS sector (2km resolution) ABI fixed grid latitude and longitude. nc files for the current GOES-East and GOES-West full disk and CONUS sectors at 2km spatial resolution, which is the resolution for ADP, AOD, and FDC data files.

#Abi inform definition zip#

zip files that contain the latitude and longitude. To read in the latitude and longitude arrays for the ABI fixed grid from external netCDF4 (.nc) files, instead of calculating the latitude and longitude arrays on the fly from the GOES Imager Projection information in the Level 2 file.īelow are. If you are working with ABI Level 2 files for the full disk or CONUS sectors, it can be easier We provide a Python function that can be used to calculate latitude and longitude from the GOES Imager Projection information in any ABIĭownload Files Containing Latitude and Longitude for 2km Resolution Full Disk & CONUS Sectors

H (perspective point height + semi-major axis)ĭon’t worry! We did the math for you.

y variable (fixed grid N/S elevation angle in radians).

x variable (fixed grid E/W scanning angle in radians).

(image courtesy of GOES-R PUG click image to open it in a separate tab)Īll of the information needed to calculate latitude and longitude are provided in the ABI data file:

#Abi inform definition series#

Latitude (φ) and longitude (λ) can be calculated using a series of equations, provided in the GOES-R PUG.Ĭoordinate Frames for GOES Imager Projection (ABI Fixed Grid) Navigation For a given point P on the Earth with ABI fixed grid coordinates (y, x), the The figure below shows the coordinate frames for the latitude/longitude calculations. If you want to work with ABI Level 2 files using latitude and longitude to plot the data variables (e.g., ADP, AOD, FDC), then it is necessary to calculate latitude and longitude from the GOES Imager Projection information.

#Abi inform definition full size#

Projection ( click image to open full size version).Ĭalculating Latitude and Longitude from the GOES Imager Projection Note the distinctive “curved” view of the Earth from the geostationary satellite Radiance (L1b) data visualized using the GOES Imager Projection is shown below. What does this mean for you as an end user? It is possible to work with ABI data using the GOES Imager Projection directly an example of GOES-16 ABI CONUS sector band 2 Included as separate variables in most ABI data files, including the Level 2 files we use in our training sessions (e.g., ADP, AOD, FDC). As a result, latitude and longitude are not The GOES Imager Projection information is used instead of latitude and longitude, to save ABI data file space.

It is a map projection based on the geostationary viewing perspective of the GOES-East or GOES-West satellite. The GOES Imager Projection, also called the ABI Fixed Grid, is the projection information included in all ABI Level 1b radiance data files and most ABI Level 2ĭerived product data files.

Information on this page is adapted from the GOES-R Series Product Definition and User’s Guide (PUG), Volume 5: Level 2+ Products, Section 4.2.