| Start Date | Start Time | End Date | End Time | Data Quality Metric |
|---|---|---|---|---|
| 05/04/1998 | 0000 | 06/16/1998 | 1715 | Suspect |
| Subject: | SGP/MFRSR/E13 - Shadowband misalignment |
| DataStreams: | sgpmfrsrlangleyE13.c1, sgpmfrsrE13.b1, sgpmfrsrE13.a0, sgpmfrsrlangplotE13.c1 |
| Description: | The E13 MFRSR developed a shading problem on or about 05/04. (The exact date when this
problem started is difficult to pin down exactly.) The shading problem is easy to identify
on a clear day because plots of direct beam and diffuse irradiance versus time become
"fuzzy". The total irradiance is not affected.
In response to the shading problem, a whole sequence of events then ensued: these actions
were designed to solve the shading problem but did not succeed until the very end.
Here's a rundown of what took place:
98/05/11 - shadowband adjustment was made at 1544 GMT
- this adjustment corrected the shading problem that
occurred in the morning, but inadvertently caused
a PM shading problem
98/05/20 - shadowband adjustment at 1804 GMT
98/05/21 - shadowband adjustment at 1630 GMT
98/06/01 - shadowband adjustment at 1910 GMT
98/06/02 - shadowband adjustmnet at 1550 GMT
Alas, these adjustments did not solve the shading problem and
it seemed to get worse (for example, on 06/11 the shading
is VERY BAD from sunup until about 1500 LST).
98/06/16 - shadowband adjustment at 1715 GMT
This final adjustment seems to a solved the problem! |
| Suggestions: | |
| Measurements: | sgpmfrsrlangleyE13.c1: more
sgpmfrsrlangplotE13.c1: more sgpmfrsrE13.b1: more sgpmfrsrE13.a0: more |