4
$\begingroup$

What is the exact difference between GFS 0.25 and GDAS 0.25 data which is available in http://nomads.ncep.noaa.gov/.

And are the GFS 0.5 and 1 degree data available in the above url and here the same?

$\endgroup$

1 Answer 1

1
$\begingroup$

From this page: https://www.emc.ncep.noaa.gov/emc/pages/numerical_forecast_systems/gfs.php

As I understand, The Global Data Assimilation System (GDAS) is just that, an assimilation system. It takes in real-world data from sensors across the globe and bins it into a regular grid. It is used then as an input or starting guess to the Global Forecast System (GFS). Because it is using real-world data, it only works going up to the current time.

The GFS takes the GDAS as a starting point, and then using physics equations and other methods it forecasts what conditions will be like hours or days from the starting point.

$\endgroup$

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.