NLC 2014-07-10/11
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: 2014-07-10/11
UT forms bright height azimuth comments
ness top bot left rght e.g. weather
-------- ----- ------ --- --- ---- ---- --------------------------------
21:30:01 X almost overcast
21:45:05 X widespread patchy cloud
22:00:02 0 cloud to h 10
22:15:02 0 cloud to h 10
22:30:02 IV? cloud to h 10, moonlit contrail?
22:45:19 IV? cloud to h 10, moonlit contrail?, bright spot above Arcturus
23:00:32 IV? cloud to h 5, two moonlit contrails?
23:15:31 IV? cloud to h 5, two moonlit contrails?
23:30:53 IV 1 cloud to h 5, two "contrails"
23:45:32 IV 2 cloud to h 5, one "contrail"
00:00:32 IV 3 8 cloud to h 5, one "contrail"
00:15:32 IV 3 8 cloud to h 5
00:30:32 IV 2 9 cloud to h 5
00:45:32 NLC 1 10 cloud to h 5
01:00:31 0 cloud to h 5
01:15:19 0 cloud to h 5
01:30:19 0 cloud to h 5
01:45:10 0 cloud to h 5
02:00:10 0
02:15:01 0
02:30:05 0
02:45:01 0
03:00:01 0
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: 2014/07/10-11
Start: 22:30
End: 00:45
Forms: IV
Max elevation: 10
Max brightness: 3
Comments:
Through cloud.
<a href="http://www.chiandh.me.uk/nlccam/20140710-11.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
The main periods of absence of NLC are reported to the NLC Observers' Home Page:
Name: Horst Meyerdierks Country: Scotland Location: Edinburgh Date: 2014/07/10-11 Start: 01:00 End: 03:00 Comments:
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) -------- ------ ----- ----- ----- ----- ----- ------------------- 22:30:02 1.000 334.8 -8.6 -0.9 120.9 0-255 q5210.jpg m5210.jpg 22:45:19 4.000 338.3 -9.5 -1.5 59.0 0-255 q5214.jpg m5214.jpg 23:00:32 8.000 341.8 -10.2 -2.1 31.2 0-255 q5218.jpg 23:15:31 8.000 345.2 -10.8 -2.5 21.4 0-255 q5222.jpg m5222.jpg 23:30:53 15.000 348.8 -11.3 -2.8 16.7 0-255 q5228.jpg m5228.jpg 23:45:32 8.000 352.3 -11.6 -3.0 14.3 0-255 q5232.jpg m5232.jpg 00:00:32 8.000 355.8 -11.8 -3.1 13.0 0-255 q5238.jpg 00:15:32 8.000 359.4 -11.9 -3.2 12.5 0-255 q5244.jpg 00:30:32 8.000 2.9 -11.9 -3.1 12.7 0-255 q5250.jpg 00:45:32 8.000 6.5 -11.7 -3.0 13.7 0-255 q5256.jpg m5256.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).
