Updated NPP_GRANULE_ID_BASETIME value?

[gfireman]

ADL 3.1 envSetup.* includes a value for NPP_GRANULE_ID_BASETIME:

Code: Select all

# The value of this variable affects the granule ID utility.  It is set
# correctly for data that ships with ADL and prelaunch proxy data.  If real
# NPP data is processed by ADL, this variable will need to be updated.  That
# value will not be known until NPP launch.  An updated value will be posted
# on the ADL User's forum (https://forums.ssec.wisc.edu/index.php) after
# launch.
export NPP_GRANULE_ID_BASETIME=1300968033000000

When will the new value be known?

[kbisanz]

I've been told the correct operational value for $NPP_GRANULE_ID_BASETIME is 1698019234000000. You should be able to update that value and resource the environment script and be good to go. We haven't had a chance to test that with ADL yet, but it *should* work.

Note that you only want to use the new value if you're using real data from NPP. If you're using the data shipped with ADL, the value needs to stay as shipped.

[markgreenman]

I've been told the correct operational value for $NPP_GRANULE_ID_BASETIME is 1698019234000000. You should be able to update that value and resource the environment script and be good to go. We haven't had a chance to test that with ADL yet, but it *should* work.

Has the above been confirmed by anyone?

thanks.

[kbisanz]

That value is correct. Myself and others have successfully ran using NPP data with that value.

If you want to run with the proxy data that shipped as part of ADL (the staged data), you need to use the old value.

Basically:
Prestaged data: Use 1300968033000000
NPP data: Use 1698019234000000

[markgreenman]

Is the value for the NPP_GRANULE_ID_BASETIME environment variable compiled into the code, or merely referenced at run-time? If the former, could it be modified to be just referenced at run time?

[houchin]

It is referenced at runtime.