| Description: | DQR No: Platform: MFRSR
Subject: E24 - MFRSR out of alignment
Date Submitted: 1 Feb 1996
Submitted By: Jim Barnard _X_ Instrument Mentor
___ EST Member
___ Science Team Member
___ Other _____________________________
For questions or problems, please contact the ARM Experiment Center at
509-375-6898 or via email at problems@arm.gov.
Platform/Measurement:
What level data: (raw,a0,a1,b1,c1 etc): a1
What location was the data collected at:
Period of time in question
Begin Date 95/11/07 Time 00:00 (GMT)
End Date / / Time : (GMT) - ongoing problem
Data should be labeled:
___ questionable ___ All data fields affected
_x_ incorrect _x_ Only some data fields affected
___ wrong calibration
___ others
Discussion of Problem: The shadowband of the MFRSR is not fully
shading the detector head. During the morning hours, this partial
shading causes some data to have a "saw tooth" pattern; these data are
clearly bad. The direct normal and diffuse irradiances are subject to
this problem, however, the total downwelling irradiance is OK. In the
afternoon, all the data fields appear to be correct.
Other observations/measurements impacted by this problem:
Suggested Corrections of the Problem: (e.g. change calibration factor and
recompute, flag data with this comment, etc.)
align MFRSR (this is much harder than it seems because of logistical problems -
the technicians have to be at the site on a clear day at solar noon to do
the alignment ) |