NLC 2014-06-19/20
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: 2014-06-19/20
UT forms bright height azimuth comments
ness top bot left rght e.g. weather
-------- ----- ------ --- --- ---- ---- --------------------------------
21:45:01 0 cloud to h 15 or 20
22:00:01 0 cloud to h 15 or 20
22:15:01 NLC? 1 cloud to h 10 or 15
22:30:02 I 2 35 cloud to h 10, some higher
22:45:02 I,II 2 40 <325 15 cloud to h 10, some cirrus higher
23:00:08 I,II 3 45 <235 20 cloud patches to h 5
23:15:08 I,II 3 30 8 <325 30 some cloud to h 5
23:30:18 I,II 3 30 10 <325 30 some cloud to h 5
23:45:19 I,IV 3 25 10 <325 20 some cloud patches
00:00:19 I,IV 3 through cloud
00:15:18 NLC through cloud
00:30:10 NLC through cloud
00:45:19 X almost overcast
01:00:18 X almost overcast
01:15:10 X almost overcast
01:30:03 X widespread cloud
01:45:02 X widespread cloud
02:00:02 I,IV through cloud
02:15:02 NLC? through cloud
02:30:05 NLC? through cloud
02:45:01 X widespread 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: 2014/06/19-20
Start: 22:15
End: 02:30
Forms: I,II,IV
Max elevation: 45
Max brightness: 3
Comments:
Cloudy 00:45-01:45.
<a href="http://www.chiandh.me.uk/nlccam/20140619-20.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) -------- ------ ----- ----- ----- ----- ----- ------------------- 22:15:01 0.250 332.7 -6.7 1.1 164.1 0-255 q3975.jpg m3975.jpg 22:30:02 0.500 336.0 -7.6 0.0 154.1 0-255 q3977.jpg m3977.jpg 22:45:02 1.000 339.4 -8.4 -0.7 131.9 0-255 q3979.jpg m3979.jpg 23:00:08 2.000 342.8 -9.1 -1.3 86.1 0-255 q3982.jpg 23:15:08 2.000 346.3 -9.7 -1.7 49.4 0-255 q3984.jpg 23:30:18 4.000 349.8 -10.1 -2.0 33.9 0-255 q3988.jpg 23:45:19 4.000 353.3 -10.4 -2.2 27.2 0-255 q3992.jpg 00:00:19 4.000 356.8 -10.6 -2.3 24.2 0-255 q3996.jpg 00:15:18 4.000 0.3 -10.6 -2.3 23.4 0-255 q4000.jpg m4000.jpg 00:30:10 2.000 3.7 -10.6 -2.3 24.5 0-255 q4003.jpg 02:00:02 0.500 24.4 -7.5 0.1 155.6 0-255 q4021.jpg 02:15:02 0.250 27.7 -6.6 1.2 164.9 0-255 q4023.jpg m4023.jpg 02:30:05 0.125 31.0 -5.6 3.3 170.1 0-255 q4026.jpg m4026.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).
