NLC 2015-06-02/03

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 compact camera with limited field of view
          A ~325-35, h ~0-40; images every 15 min
Date: 2015-06-02/03

   UT     forms  bright   height   azimuth   comments
                  ness   top bot  left rght  e.g. weather
--------  -----  ------  --- ---  ---- ----  --------------------------------
21:30:02  0
21:45:02  X
22:00:06  X
22:15:07  X
22:30:09  X
22:45:10  II         2                       through cloud
23:00:19  I          1                       through cloud
23:15:18  II         1                       through cloud
23:30:19  II         2                       through cloud
23:45:32  II         2                       through cloud
00:00:32  I,II       2    12      <325       through cloud
00:15:32  I,II       3    12      <325       through cloud
00:30:32  I,II       3                       through cloud
00:45:19  I          2                       through cloud
01:00:19  I          1                       through cloud
01:15:10  X
01:30:10  X
01:45:02  X
02:00:02  X
02:15:08  X
02:30:05  X
02:45:01  X

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 periods of positive sightings of NLC are reported to the NLC Observers' Home Page:

Name: Horst Meyerdierks
Country: Scotland
Location: Edinburgh
Date: 2015/06/02-03
Start: 22:45
End: 01:00
Forms: I,II
Max elevation: 12
Max brightness: 3
Comments: Through cloud.
http://www.chiandh.eu/nlccam/20150602-03.shtml

forms: I: veil
       II: bands
       III: waves
       IV: whirls
       NLC: 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. For some, there may also be an unsharp-masked version of the image.

   UT      exp    A    hSun  h15   h85  stretch  image   (masked)
-------- ------ ----- ----- ----- -----  ----- -------------------
22:45:10  2.000 340.0  -9.8  -1.7  45.3  0-255 q1653.jpg m1653.jpg
23:00:19  4.000 343.5 -10.4  -2.2  27.0  0-255 q1657.jpg m1657.jpg
23:15:18  4.000 346.9 -11.0  -2.5  19.7  0-255 q1661.jpg m1661.jpg
23:30:19  4.000 350.5 -11.4  -2.8  16.1  0-255 q1666.jpg m1666.jpg
23:45:32  8.000 354.0 -11.7  -3.0  14.1  0-255 q1672.jpg
00:00:32  8.000 357.6 -11.8  -3.1  13.3  0-255 q1677.jpg m1677.jpg
00:15:32  8.000   1.1 -11.8  -3.1  13.1  0-255 q1683.jpg
00:30:32  8.000   4.7 -11.7  -3.0  13.7  0-255 q1689.jpg
00:45:19  4.000   8.2 -11.5  -2.9  15.2  0-255 q1694.jpg
01:00:19  4.000  11.7 -11.1  -2.7  18.1  0-255 q1699.jpg m1699.jpg

exp: Exposure time in seconds (200 ISO, f/2.8).
A: Azimuth of the Sun (degrees).
hSun: Altitude of the Sun (degrees, negative below horizon).
h15: Max. altitude of sunlight at 15 km height (degrees).
h85: Max. altitude of sunlight at 85 km height (degrees).
stretch: Contrast stretch (0-255 means no stretch).