NLC 2011-05-20/21

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.

Name of observer: Horst Meyerdierks
Location: Royal Observatory Edinburgh, 55.9N 3.2W
          unattended dSLR with limited field of view A ~325-35, h ~0-40
          images every 15 min
Date: 2011-05-20/21

  UT   forms  bright   height   azimuth   comments
               ness   top bot  left rght  e.g. weather
-----  -----  ------  --- ---  ---- ----  --------------------------------
21:00  X                                  cloud to h 20
21:15  X                                  cloud to h 20
21:30  0                                  cloud to h 10
21:45  X
22:00  X
22:15  X                                  fake NLC: contrail
22:30  0                                  cloud to h 5
22:45  0                                  cloud to h 5
23:00  0
23:15  0                                  cloud to h 5
23:30  0
23:45  0
00:00  0                                  cloud to h 5
00:15  0
00:30  0                                  cloud to h 5
00:45  0                                  cloud to h 5
01:00  0                                  cloud to h 5, fake NLC cirrus
01:15  0                                  cloud to h 5, fake NLC cirrus
01:30  0                                  cloud to h 5, fake NLC cirrus
01:45  0                                  cloud to h 5
02:00  0                                  cloud to h 5, fake NLC cirrus
02:15  0                                  cloud to h 5, fake NLC cirrus
02:30  0                                  cloud to h 5, fake NLC cirrus
02:45  0                                  cloud to h 5, fake NLC cirrus
03:00  0                                  cloud to h 5, fake NLC cirrus
03:15  0                                  cloud to h 5, fake NLC cirrus

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: 2011/05/20-21
Start: 22:30
End: 03:15
Comments: some cloud

Images

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