NSA/GNDRAD/C1 - Noisy PIR Data

During the period referenced, the ground PIR was noisy in  
              comparison to the the sky PIR data.  (Note U021211.1 documents
              same problem for 9/1/98-2/28/99)

              The noise problem continued after the GNDRAD data logger was 
              replaced in late September. Particularly strong examples of the 
              noise can be seen in data from 11/10 - 11/19/99. The peak to 
              peak noise reaches 12 W/m2.

• PIR1 minimum(pir1_min)
• PIR1 unshaded maximum(pir1_max)
• PIR1 unshaded standard deviation(pir1_sd)
• PIR1 mean(pir1_mean)

• PIR1 unshaded standard deviation(pir1_sd)
• PIR1 unshaded maximum(pir1_max)
• PIR1 mean(pir1_mean)
• PIR1 minimum(pir1_min)