NLC 2014-07-11/12
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: 2014-07-11/12
UT forms bright height azimuth comments
ness top bot left rght e.g. weather
-------- ----- ------ --- --- ---- ---- --------------------------------
21:30:01 X widespread cloud
21:45:05 X widespread cloud
22:00:05 X widespread cloud
22:15:07 X widespread cloud
22:30:09 IV 2 through cloud
22:45:19 I,IV 3 15 through cloud
23:00:32 III,IV 4 through cloud
23:15:32 I,III,IV 3 through cloud
23:30:32 IV 2 through cloud
23:45:32 NLC 2 through cloud
00:00:32 NLC 3 through cloud
00:15:32 NLC 3 through cloud
00:30:32 NLC 2 through cloud
00:45:32 NLC 3 through cloud
01:00:19 NLC 2 through cloud
01:15:19 IV 4 through cloud
01:30:19 III 3 17 through cloud
01:45:10 II,III 3 23 355 >35 cloud to h 10
02:00:09 II,III 2 35 345 >35 cloud to h 10
02:15:06 I 2 >45 20 335 >35 cloud to h 10
02:30:05 I 1 >45 25 330 >35 cloud to h 10 or 15
02:45:01 0 cloud to h 10
03:00:01 X patchy cloud
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: 2014/07/11-12
Start: 22:30
End: 02:30
Forms: I.II,III,IV
Max elevation: 45
Max brightness: 4
Comments:
Through cloud.
<a href="http://www.chiandh.me.uk/nlccam/20140711-12.shtml">Images</a>.
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) -------- ------ ----- ----- ----- ----- ----- ------------------- 22:30:09 2.000 334.8 -8.8 -1.0 112.7 0-255 q5295.jpg 22:45:19 4.000 338.2 -9.6 -1.6 52.2 0-255 q5298.jpg 23:00:32 8.000 341.7 -10.3 -2.1 28.6 0-255 q5302.jpg 23:15:32 8.000 345.2 -10.9 -2.5 19.9 0-255 q5306.jpg 23:30:32 8.000 348.7 -11.4 -2.8 15.8 0-255 q5311.jpg 23:45:32 8.000 352.2 -11.8 -3.1 13.5 0-255 q5316.jpg 00:00:32 8.000 355.8 -12.0 -3.2 12.3 0-255 q5322.jpg 00:15:32 8.000 359.3 -12.1 -3.2 11.9 0-255 q5328.jpg 00:30:32 8.000 2.9 -12.0 -3.2 12.1 0-255 q5334.jpg 00:45:32 8.000 6.4 -11.9 -3.1 12.9 0-255 q5340.jpg 01:00:19 4.000 9.9 -11.6 -2.9 14.7 0-180 q5345.jpg 01:15:19 4.000 13.4 -11.1 -2.7 17.9 0-255 q5351.jpg 01:30:19 4.000 16.9 -10.6 -2.3 24.2 0-255 q5356.jpg 01:45:10 2.000 20.4 -9.9 -1.9 38.8 0-255 q5359.jpg 02:00:09 2.000 23.8 -9.1 -1.3 82.7 0-255 q5362.jpg 02:15:06 1.000 27.2 -8.2 -0.6 138.8 0-255 q5364.jpg 02:30:05 0.500 30.5 -7.2 0.4 159.4 0-255 q5366.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).
