chi and h site logo

NLC 2009-06-01/02

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 ~330-30, h ~0-40
          images every 5 min
Date: 2009-06-01/02

  UT   forms  bright   height   azimuth   comments
               ness   top bot  left rght  e.g. weather
-----  -----  ------  -------  ---- ----  --------------------------------
21:20   0                                 cloud h 0 to 10
21:25   0                                 cloud h 0 to 10
21:30   0                                 cloud h 0 to 10
21:35   0                                 cloud h 0 to 15
21:40   0                                 cloud h 0-5 and 10-20
21:45   0                                 cloud h 0-5 and 10-20
21:50   0                                 cloud h 0 to 5
21:55   II?     1      20  10   330   10  cloud h 0 to 5
22:00   II      1      20  10   340    5  cloud h 0 to 5
22:05   II      1-2    25  15   345   10  cloud h 0 to 10
22:10   II      2      30  15   350   20  cloud h 0 to 15
22:15   IV      2      35  15     0   25  cloud encroaching on NLC
22:20   X                                 patchy cloud all over field
22:25   X                                 patchy cloud all over field
22:30   X                                 patchy cloud all over field
22:35   X                                 patchy cloud
22:40   X                                 cloud
22:45   X                                 cloud
22:50   X                                 cloud
22:55   X                                 cloud
23:00   X                                 cloud
23:05   X                                 cloud
23:10   II      2                         through cloud gap
23:15   IV      2                         through cloud gap
23:20   II,IV   2      20  <10  340  >25  through cloud gap
23:25   II,IV   2      20  <10  340   25  through cloud gap
23:30   II      1-2    20   10  340   30  cloud h 0 to 10
23:35   II      2      15   10  350   30  cloud h 0 to 10
23:40   II      2      20   15  350  >30  cloud h 0 to 10
23:45   II      2      20   15  350  >30  cloud h 0 to 10
23:50   I,II    2      20   15    0  >30  cloud h 0 to 10
23:55   0?                                cloud h 0 to 10, patchy cloud to h 30
00:00   0?                                cloud h 0 to 10, patchy cloud to h 30
00:05   0                                 cloud h 0 to 10, patchy cloud to h 30
00:10   0                                 cloud h 0 to 15
00:15   X                                 cloud
00:20   X                                 cloud
00:25   X                                 cloud
00:30   X                                 cloud
00:35   X                                 cloud
00:40   X                                 cloud
00:45   X                                 cloud
00:50   X                                 cloud
00:55   X                                 cloud
01:00   X                                 cloud
01:05   X                                 cloud
01:10   X                                 cloud
01:15   X                                 cloud
01:20   NLC?                              through cloud gap
01:25   X                                 cloud
01:30   X                                 cloud
01:35   X                                 cloud
01:40   X                                 cloud
01:45   X                                 cloud
01:50   NLC?    1-2    20   10 <330  >10  cloud below and to right
01:55   II,IV   2      25   10  330  >25  cloud below and to right
02:00   II,IV   2      30   15  340  >25  cloud h 0 to 10, on right to 20
02:05   IV      2      35   20  345   20  cloud h 0 to 10
02:10   NLC     1      25   20    0   25  cloud h 0 to 10
02:15   IV?     1      25   20    0   35  cloud h 0 to 10
02:20   0                                 cloud h 0 to 10
02:25   0                                 cloud h 0 to 15
02:30   0                                 cloud h 0 to 15
02:35   0                                 cloud h 0 to 15
02:40   0                                 cloud h 0 to 15
02:45   0                                 cloud h 0 to 15
02:50   0                                 cloud h 0 to 15
02:55   0                                 cloud h 0 to 15
03:00   0                                 cloud h 0 to 15

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: only in binoculars
            3: intensely bright and vivid
            2: else

NLCnet report

Name: Horst Meyerdierks
Country: Scotland
Location: Edinburgh
Date: 2008/06/01-02
Start: 21:55
End: 02:15
Forms: II, IV
Max elevation: 35
Max brightness: 2
Comments:
<a href="http://www.chiandh.me.uk/p/NLC_2009-06-01/02>Images</a>.

forms: I: veil
       II: bands
       III: waves
       IV: whirls
       O: other than or multiple of I-IV
brightness: 1: very weak
            2: clearly detected
            3: clearly visible
            4: very bright
            5: extremely bright

Images

Listed below are the images with positive sightings of NLC. These have been processed merely to adjust the brightness for underexposure. In some cases there is an additional image where an aggressive unsharp mask has been applied to bring out faint NLC.