Dear Colleagues. I have a rainfall data of 30 minutes interval from GPM(NASA), I also have an hourly rainfall data of one hour interval from ground 2eather station. The satellite data start at 0: 00 hour while the ground data start at 4:37PM. My question is, how do I convert the half hour data of the satellite to match the one hour ground data to enable me run a regression analysis to use the ground data to validate the satellite data?. I will appreciate your kind contribution as this has been given me sleepless night. Thanks
If you have continuous satellite data of 30 minutes, you can just add two consecutive values to get hourly data.
An easy way would be to start the NASA dataset from 4:30PM, and add up two 30 min records to make it an hourly data series. Use that to corrrelate against the ground data that starts at 4:37PM.
Yes, they will be 7 minutes off, but if you look at the entire year, a 7 minute offset is not a huge error.
There is no other way, as one cannot divide the 30 minute or 1 hr data into 1 minute resolution - the data is the sum of the rain that fell in that entire interval.
Adelakun Moses Salami - An alternative will be to look at the nearby raingauge data.
Have a look at UCUM for the right units: https://ucum.org/ucum.html
In particular the unit conversion tool: https://ucum.nlm.nih.gov/ucum-service.html#conversion
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