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NLC 2012-07-20/21

BAA report

The report to the BAA Aurora Section gives an overview of the night, which times were cloudy, free of NLC, or with sightings of NLC.

          unattended dSLR with limited field of view A ~325-35, h ~0-40
          images every 15 min
Date: 2012-07-20/21

  UT   forms  bright   height   azimuth   comments
               ness   top bot  left rght  e.g. weather
-----  -----  ------  --- ---  ---- ----  --------------------------------
21:15  X                                  overcast
21:30  X                                  overcast
21:45  X                                  overcast
22:00  X                                  overcast
22:15  X                                  almost overcast
22:30  X                                  almost overcast
22:45  X                                  almost overcast
23:00  X                                  cloud to h 25
23:15  X                                  widespread cloud
23:30  X                                  widespread cloud
23:45  X                                  cloud on right
00:00  0
00:15  0
00:30  0
00:45  0
01:00  0
01:15  0
01:30  0
01:45  0
02:00  0
02:15  0
02:30  0
02:45  0
03:00  0
03:15  0

forms: I: veil
       II: bands
       III: waves
       IV: whirls
       NLC: other than or multiple of I-IV
       0: no NLC
       X: no decision possible (mist, cloud etc.)
brightness: 1: very weak
            2: clearly detected
            3: clearly visible
            4: very bright
            5: extremely bright

NLCnet report

The main periods of absence of NLC are reported to the NLC Observers' Home Page:

Name: Horst Meyerdierks
Country: Scotland
Location: Edinburgh
Date: 2012/07/20-21
Start: 00:00
End: 03:15
Comments: some cloud

Images

No NLC has been observed, hence no images are made available here.