Hi All,
I have been given some NOAA AVHRR files to read.... (High Resolution Picture Transmission (HRPT) 1KM Level 1B apparently) i can read them in this software called HRPT Reader. Has anyone come across reading anything like this in FME. The client wants Sea Surface Temp info out of the RASTER. I have tried in fme 2017 but nothing seems to work. I can supply the file (it has not extension) if anyone wants a look . FILE
Any thoughts appreicated
Thanks Steve
Hi,
Not sure this helps but according to the doc's gdal can also read this format, possibly you can use that to convert into a format that FME can read.
Hope this helps.
HRPT is a binary format, the official structure is described in https://www1.ncdc.noaa.gov/pub/data/satellite/publications/podguides/TIROS-N%20thru%20N-14/pdf/NCDCPOD2.pdf
A simplified overview is available http://www.sat.dundee.ac.uk/hrptformat.html
While it is possible to create a custom format reader in FME using the SDK, it's complicated (See https://knowledge.safe.com/articles/798/developing-a-new-format-readerwriter-with-the-fme.html for a starting place).
In FME you are probably better off using a python caller with either gdal or mpop
see http://www.pytroll.org/quickstart_avhrr.html for a mpop AVHRR tutorial
Personally I would check with the client as to the need to read HRPT data specifically, as opposed to the processed Sea Surface Temperature datasets in NetCDF like https://podaac.jpl.nasa.gov/dataset/AVHRR_SST_METOP_B-OSISAF-L2P-v1.0?ids=Sensor&values;=AVHRR&search;=Sea%20Surface%20Temperature
Many Thanks Guys. I will try and go with jdh's idea of using the netCDF data instead. Thanks again
Steve
HRPT is a binary format, the official structure is described in https://www1.ncdc.noaa.gov/pub/data/satellite/publications/podguides/TIROS-N%20thru%20N-14/pdf/NCDCPOD2.pdf
A simplified overview is available http://www.sat.dundee.ac.uk/hrptformat.html
While it is possible to create a custom format reader in FME using the SDK, it's complicated (See https://knowledge.safe.com/articles/798/developing-a-new-format-readerwriter-with-the-fme.html for a starting place).
In FME you are probably better off using a python caller with either gdal or mpop
see http://www.pytroll.org/quickstart_avhrr.html for a mpop AVHRR tutorial
Personally I would check with the client as to the need to read HRPT data specifically, as opposed to the processed Sea Surface Temperature datasets in NetCDF like https://podaac.jpl.nasa.gov/dataset/AVHRR_SST_METOP_B-OSISAF-L2P-v1.0?ids=Sensor&values;=AVHRR&search;=Sea%20Surface%20Temperature
"not recognized as a supported file format"
were you able to open these SST NetCDF files from JPL in fme ?
Thanks Again,
Steve
"not recognized as a supported file format"
were you able to open these SST NetCDF files from JPL in fme ?
Thanks Again,
Steve
Using the jpl opendap server i select the variables i want (sea_surface_temperature). i leave nj and ni empty ??
To get data for x location select lat and long and provide the coordinates:
northernmost_latitude: -52.6559982 (nj)
southernmost_latitude: -71.1429977 (ni)
easternmost_longitude: 9.40999985 (nj)
westernmost_longitude: -54.0480003 (ni)
then export the netcdf v3 ... . is this the process you would go thru to export data for an area of interest you have ?
Also, sst units are kelvin, add 273 to get Celsius ? do i need to use the scale factor of 0.01 ? my results are strange temps ...
thanks steve