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Some of the automatically assembled weather files have weird data - where can I get good quality weather files for my hemisphere, especially Africa ?

Some of the automatically assembled weather files have weird data - where can I get good quality weather files for my hemisphere, especially Africa ?

Some of the automatically assembled weather files have weird data - where can I get good quality weather files for my hemisphere, especially Africa ?

Some of the automatically assembled weather files have weird data - where can I get good quality weather files for my hemisphere, especially Africa ?

Some of the automatically assembled weather files have weird data - where can I get good quality weather files for my hemisphere, especially Africa ?

Some of the automatically assembled weather files have weird data - where can I get good quality weather files for my hemisphere, especially Africa ?

Update:

My observation is based on a file I bought a few years ago - our attention was drawn to a high and constant level of snow over a city in South Africa. On further inspection we found :

1. Horizontal Infrared Radiation from Sky is a constant
2. All of the illuminance and luminance values are a constant
3. Sky cover values are also a constant
4. Precipitable water is a constant and also unrealistic.
5. Aerosol Optical Depth is a constant
6. Snow Depth is a constant and also unrealistic

BTW - this was not a DoE file - but a commercial file. More recently we have had good value from WhiteBox Technologies.

But that was just one file. My concern is that many Simulationists use these files in good faith but there does not seem to be a universal quality control method. Perhaps it's time we devise a ISO Standard ?

Also, any simulation should use a number of files - ASHRAE should demand not one result, but multiple results for different weather scenario - a typical scenario, and a few un-typical scenarios ? I quite like the idea of using a TMY file as a start, but then using say an artificial hot year and then a cold year ( or some combination of the extremes )

Does this make sense ?

Some of the automatically assembled weather files have weird data - where can I get good quality weather files for my hemisphere, especially Africa ?

Update:

My observation is based on a file I bought a few years ago - our attention was drawn to a high and constant level of snow over a city in South Africa. On further inspection we found :

1. Horizontal Infrared Radiation from Sky is a constant
2. All of the illuminance and luminance values are a constant
3. Sky cover values are also a constant
4. Precipitable water is a constant and also unrealistic.
5. Aerosol Optical Depth is a constant
6. Snow Depth is a constant and also unrealistic

BTW - this was not a DoE file - but a commercial file. More recently we have had good value from WhiteBox Technologies.

But that was just one file. My concern is that many Simulationists use these files in good faith but there does not seem to be a universal quality control method. Perhaps it's time we devise a ISO Standard ?

Also, any simulation should use a number of files - ASHRAE should demand not one result, but multiple results for different weather scenario - a typical scenario, and a few un-typical scenarios ? I quite like the idea of using a TMY file as a start, but then using say an artificial hot year and then a cold year ( or some combination of the extremes )

Does this make sense ?