The EPW specifications state that the meteorological fields will have one of a specific set of data source & uncertainty flag codes.

(I'm referring to page 52 of this document: https://energyplus.net/sites/default/files/pdfs_v8.3.0/AuxiliaryPrograms.pdf)

The data source flag codes are supposed to be: A-F, and ?

The uncertainty flag codes are supposed to be: 0, and 7-9 (values 1-6 not used)

However I'm seeing values that are not in these ranges in some sample files.

Example: TMY3 data for Syracuse, NY (https://bcl.nrel.gov/node/79057)

For the first hour's data the codes are:

?9?9?9?9E0?9?9?9?9?9?9?9?9?9?9?9?9?9?9*_*9*9*9*9*9
                                      ^^^^^^^^^^^^

It is the last 12 codes which seem to have some inconsistencies with the specifications. Neither an underscore character nor an asterisk seems to be valid...

What does this mean? Am I looking at out of date specifications?

Thanks

The EPW specifications state that the meteorological fields will have one of a specific set of data source & uncertainty flag codes.

(I'm referring to page 52 of this document: https://energyplus.net/sites/default/files/pdfs_v8.3.0/AuxiliaryPrograms.pdf)

The data source flag codes are supposed to be: A-F, and ?

The uncertainty flag codes are supposed to be: 0, and 7-9 (values 1-6 not used)

However I'm seeing values that are not in these ranges in some sample files.

Example: TMY3 data for Syracuse, NY (https://bcl.nrel.gov/node/79057)

For the first hour's data the codes are:

?9?9?9?9E0?9?9?9?9?9?9?9?9?9?9?9?9?9?9*_*9*9*9*9*9
                                      ^^^^^^^^^^^^

It is the last 12 codes which seem to have some inconsistencies with the specifications. Neither an underscore character nor an asterisk seems to be valid...

What does this mean? Am I looking at out of date specifications?

Thanks

The EPW specifications state that the meteorological fields will have one of a specific set of data source & uncertainty flag codes.

(I'm referring to page 52 of this document: https://energyplus.net/sites/default/files/pdfs_v8.3.0/AuxiliaryPrograms.pdf)

The data source flag codes are supposed to be: A-F, and ?

The uncertainty flag codes are supposed to be: 0, and 7-9 (values 1-6 not used)

However I'm seeing values that are not in these ranges in some sample files.

Example: TMY3 data for Syracuse, NY (https://bcl.nrel.gov/node/79057)

For the first hour's data the codes are:

?9?9?9?9E0?9?9?9?9?9?9?9?9?9?9?9?9?9?9*_*9*9*9*9*9
                                      ^^^^^^^^^^^^

It is the last 12 codes which seem to have some inconsistencies with the specifications. Neither an underscore underscore character nor or an asterisk asterisk seems to be valid...valid...

What does this mean? Am I looking at out of date specifications?

Thanks