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von Timo Kuhmonen
3. Mai 2021, 21:21
Forum: Meteore
Thema: Fireball - Northern Finland & Sweden (2020-12-04)
Antworten: 1
Zugriffe: 372

Re: Fireball - Northern Finland & Sweden (2020-12-04)

fyi,

some addional data presented on Juha Vierinen YouTube channel from this case. At end of video, there is mentioned scientific paper coming out for study this case (no schedule published yet...)
https://www.youtube.com/watch?v=6pYSFzfGjMI
von Timo Kuhmonen
19. Apr 2021, 21:30
Forum: Polarlicht und Astronomie
Thema: (Sammelthread) Polarlicht-Vorwarnungen 2021
Antworten: 33
Zugriffe: 5848

Re: (Sammelthread) Polarlicht-Vorwarnungen 2021

M20210419_213857_+P.jpg fyi, little bit of aurora activity right now, on central Finland. Watec meteor cameras could see band on low northern sky. Just came also outside, visually confirmed. The band (approx 15 degrees height) is weak and diffuse. No moving forms of aurora seen. Moonlight is reduci...
von Timo Kuhmonen
15. Apr 2021, 20:48
Forum: Halos und atmosphärische Erscheinungen
Thema: [Halo] 2021-04-13 Reflection subsun, Taivaanvahti
Antworten: 1
Zugriffe: 346

[Halo] 2021-04-13 Reflection subsun, Taivaanvahti

fyi, This is the case where I posted links on the Zoom session at 14.4.2021. I put these also on forum, if someone is interested :-) From this case there is now six observations https://www.taivaanvahti.fi/observations/browse/pics/3826760/observation_id/desc/0/20 Same observations on map https://www...
von Timo Kuhmonen
24. Mär 2021, 22:32
Forum: Polarlicht und Astronomie
Thema: (Sammelthread) Polarlicht-Vorwarnungen 2021
Antworten: 33
Zugriffe: 5848

Re: (Sammelthread) Polarlicht-Vorwarnungen 2021

fyi, observing auroras on central Finland this night. I saw one "set" of auroras on northern sky, between 21:40...21:50 UTC. Those were not the strongest here visually. Maybe too weak ones, so that it could be seen -or photographed- on central europe ?
von Timo Kuhmonen
18. Mär 2021, 20:29
Forum: Halos und atmosphärische Erscheinungen
Thema: [Halo] Pyramid halos, Finland (various years...)
Antworten: 5
Zugriffe: 942

Re: [Halo] Pyramid halos, Finland (various years...)

another one from Rovaniemi / Finland at 18.3.2021 --> 28° ring halo [Scheiner]
https://www.taivaanvahti.fi/observations/show/96861
von Timo Kuhmonen
4. Mär 2021, 22:54
Forum: Polarlicht und Astronomie
Thema: 2021-03-02: Fotografisches Polarlicht
Antworten: 20
Zugriffe: 2006

Re: 2021-03-02: Fotografisches Polarlicht

fyi, couple of other STEVE's in Taivaanvahti, for 2nd March 2021... https://www.taivaanvahti.fi/observations/show/96401 https://www.taivaanvahti.fi/observations/show/96411 https://www.taivaanvahti.fi/observations/show/96402 The map looks interesting, propably need to look text more pricisely... EDIT...
von Timo Kuhmonen
1. Mär 2021, 20:48
Forum: Polarlicht und Astronomie
Thema: (Sammelthread) Polarlicht-Vorwarnungen 2021
Antworten: 33
Zugriffe: 5848

Re: (Sammelthread) Polarlicht-Vorwarnungen 2021

fyi,

today around 19:49 UTC, in central Finland I saw auroras moving at northern low sky (Watec 910). Looks like the same time a bit of drop in magnetic field values (at SGO magnetogram)....
von Timo Kuhmonen
1. Mär 2021, 11:59
Forum: Meteore
Thema: 2021-02-26 03:50 UT: Meteor quer durch die Schweiz
Antworten: 16
Zugriffe: 1054

Re: 2021-02-26 03:50 UT: Meteor quer durch die Schweiz

nice captures.... Did anyone had recording on at Graves frequency, within higher time resolution...? Interested to see what kind reflections there usually are, especially for the head-echos (doppler change rate per seconds)
von Timo Kuhmonen
28. Feb 2021, 11:41
Forum: Halos und atmosphärische Erscheinungen
Thema: 2021-02-22: Saharastaub
Antworten: 31
Zugriffe: 2261

Re: 2021-02-22: Saharastaub

fyi, In Finland newspapers there was indication of this brownish fine "sand-dust" at 23.2.2021. At least in Laihia & Finland, there has been this type dust on top of snow. Today I also noticed article, from Finnish meteorological Institute FMI. They are asking citizens to send samples....
von Timo Kuhmonen
28. Feb 2021, 11:31
Forum: Test Forum
Thema: chat window test ?
Antworten: 3
Zugriffe: 701

chat window test ?

does it work ok on your browsers now ? I cannot see correctly anymore the old window on top of forum main page- where single lines of posted comments was there from various users?

I use mozilla 86.0 (64bit) browser...
von Timo Kuhmonen
24. Feb 2021, 14:21
Forum: Off-Topic
Thema: Diffraction grating film
Antworten: 0
Zugriffe: 373

Diffraction grating film

hello, is there anyone on this forum, who has used a diffraction grating film ? Did not found a thread on search here... Just picked up letter in the mail, containing small piece of 1000 lines per mm grating. First look it seems almost fully transparent, but it needs to look at an suitable angle. I ...
von Timo Kuhmonen
3. Feb 2021, 21:55
Forum: Polarlicht und Astronomie
Thema: (Sammelthread) Polarlicht-Vorwarnungen 2021
Antworten: 33
Zugriffe: 5848

Re: (Sammelthread) Polarlicht-Vorwarnungen 2021

fyi. Northern light were shown on the timelapse sequence on my meteor camera (WAT 910HX, central Finland). I saw activity SGO magnetograms... Most active forms were on 19:20 UTC today (aurora belt rising up, vertical pillars). Not very bright but as the camera has large pixels, it shows auroras quit...
von Timo Kuhmonen
25. Jan 2021, 23:08
Forum: Polarlicht und Astronomie
Thema: (Sammelthread) Polarlicht-Vorwarnungen 2021
Antworten: 33
Zugriffe: 5848

Re: (Sammelthread) Polarlicht-Vorwarnungen 2021

too bad that the sky is cloudy, in central Finland. Last two hours, there is clearly seen disturbances in magnetic field (SGO magnetogram, Sodankylä, Finland)....
von Timo Kuhmonen
20. Jan 2021, 19:07
Forum: Meteore
Thema: Fireball - Northern Finland & Sweden (2020-12-04)
Antworten: 1
Zugriffe: 372

Fireball - Northern Finland & Sweden (2020-12-04)

FYI. Bright northern Taurid fireball... http://www.radio-science.net/2020/12/fireball-observed-over-northern-finland.html Interesting is here the published analysis of Sodankylä radio data (in addition to video observations). Included 3D measured VHF echoes from plasma trail. Also effects seen on th...
von Timo Kuhmonen
19. Jan 2021, 13:26
Forum: Halos und atmosphärische Erscheinungen
Thema: [Halo] Timelapse video, artificial light halos (Kittilä, Finland)
Antworten: 1
Zugriffe: 232

[Halo] Timelapse video, artificial light halos (Kittilä, Finland)

fyi. Noticed one interesting video, with allsky lens. Video is taken on Kittilä, Finland. Shows clearly the movement of crystals and location of light source(s) on ground...
https://www.taivaanvahti.fi/observations/show/95643
von Timo Kuhmonen
9. Dez 2020, 16:58
Forum: Polarlicht und Astronomie
Thema: (Sammelthread) Polarlicht-Vorwarnungen 2020
Antworten: 40
Zugriffe: 10561

Re: (Sammelthread) Polarlicht-Vorwarnungen 2020

Currently sky is cloudy in central Finland. Also cloudy night hours in local forecast (9th/10th December). Partially cloudy in forecast, but that is in the 5AM tomorrow local time. Does not look good for visual observations here. If auroras are bright enough, it could brighten cloud cover a bit.... ...
von Timo Kuhmonen
5. Dez 2020, 19:29
Forum: Polarlicht und Astronomie
Thema: 25. Sonnenfleckenzyklus beginnt...
Antworten: 44
Zugriffe: 8011

Re: 25. Sonnenfleckenzyklus beginnt...

Question related to sun activity... Has anyone here been following Tamitha Skov on YouTube ? I have found it to be very good source of information. And the things also what happen in the sun at different phases. Many times there is generic lectures, and occasionally very deep ones, like focusing to ...
von Timo Kuhmonen
1. Dez 2020, 19:04
Forum: Off-Topic
Thema: Arecibo radio telescope
Antworten: 2
Zugriffe: 571

Re: Arecibo radio telescope

fyi.Telescope site after last collapse, the movable "pick up antenna" has dropped now on top of reflector... https://www.theguardian.com/world/2020/dec/01/arecibo-radio-telescope-collapses-puerto-rico https://www.noticel.com/galeria/20201201/imagenes-aereas-exclusivas-del-colapso-del-obser...