OMNI IMF meta data

[aburrell]

Describe the bug OMNI IMF meta data float values are assigned array values instead of float/int values. This causes errors in pysat, as meta values should not be arrays.

To Reproduce Steps to reproduce the behavior:

import pysat
imf = pysat.Instrument('omni', 'hro', tag='1min', clean_level='clean')
imf.load(2021, 1)
imf.meta['YR']
Out[4]: 
FIELDNAM                 Year
SCALEMIN               [1963]
SCALEMAX               [2020]
VAR_TYPE         support_data
FORMAT                     I4
DEPEND_0                Epoch
LABLAXIS                 Year
DISPLAY_TYPE              NaN
units                     NaN
long_name                  YR
notes                     NaN
desc                     Year
value_min              [1963]
value_max              [2020]
fill            [-2147483648]
children                 None
Name: YR, dtype: object

Expected behavior float and integer values should not be arrays.

Screenshots If applicable, add screenshots to help explain your problem.

Desktop (please complete the following information):

• OS: OS X Mojave
• Version Python 3.9
• Other details about your setup that could be relevant: develop branch of pysat

Additional context Add any other context about the problem here.

[jklenzing]

Possible solutions:

• check in cdf routines if single value list is present in meta
• run the check at the pysat level
• see if this is corrected in the CDAWeb processed files, switch to those