In case you were wondering how we attempted to find satellite signals in the #LOFAR data, here is a summary of the approach:

1. The basic idea was to use satellite #TLE (two line elements) to predict when a satellite would be crossing the field of view. For each of the beams (pixels) on the sky, whe then extract some data around these event times (+/- some seconds). These are like the spectrograms included in the paper. 7/

The image below shows Figure 7 of the paper; a masterpiece by @cgbassa

(geändert) #TDI,#TLE: Störung: Behördliche Maßnahme - Polizeieinsatz
Strecke Ditzingen - Leonberg infolge eines angefahrenen Hundes auf Anordnung BPol gesperrt.
Stand 09.00 Uhr: BPol kann den verletzten Hund nicht bergen und fordert die FW sowie Tierrettung an.
Strecke bleibt gesperrt.
Ende: 2023-06-28 09:43
Quelle: strecken.info

#Celestrak has a new way to publish #TLE information for #satellite and replace legacy TXT file like in Gpredict software #hamradio
https://celestrak.org/NORAD/documentation/gp-data-formats.php

@pi9cam I'm used to working with a #radar, so "doppler tracking" means something different to me (a closed loop track based on direct #doppler #observations).

But I think I understand what you are saying. You are directing the #antenna via the #TLE and a doppler correction is being applied from that TLE, but for whatever reason itis slightly wrong so it isn't perfectly aligned.

@pi9cam I don't think I understand what I'm seeing. I assume you are tracking via passive #RF. But the waterfall doesn't look tracked--that seems to be #doppler shift through crossover.

Oh, you usually do #astronomy work, so you probably wouldn't normally even have a tracker. I bet you are just pointing at the #TLE and this little #cubesat (broadcasting on multiple channels, it seems) was close enough that you saw it.

Ein neues Citizen Science-Projekt der #NASA sammelt Beobachtungen des Blitzphänomens der oberen Atmosphäre, mit faszinierenden Aufnahmen. #Sprites #Elves #TLE #Spritacular
https://www.nasa.gov/feature/goddard/2022/sun/spritacular-nasa-s-new-citizen-science-project-to-capture-elusive-upper-atmospheric

Transient Luminous Events (TLE) are brief, powerful light emissions, generated by thunderstorms, that occur high in the atmosphere.

How to submit an observation:
https://spritacular.org/tutorials

#CitSci #TLE #Sky

I hit the current max level of 70 in two #mmorpgs recently: Holy Priest in #wow #dragonflight and a Defiler in #eq2 on the #varsoon time locked server (#TLE). The leveling experience is so vastly different between them and yet both are currently new to me despite the EQ2 TLE content being decades old since I didn't play it when it was current. I am enjoying them both for different reasons and have made amazing friends in each one. #Happy #Gaming

Phénomène lumineux transitoire : Blue jet starter très rare

https://www.infoclimat.fr/photolive-photos-meteo-296855-blue-jet-starter.html#photo6

https://www.infoclimat.fr/photolive-photos-meteo-296852-blue-jet.html#photo6

Sur Wikipedia : https://fr.wikipedia.org/wiki/Ph%C3%A9nom%C3%A8ne_lumineux_transitoire

#orage #météo #TLE

[#Rentrée2022 #Replay] En amont des réunions parents-professeurs qui se dérouleront du 26 au 29 septembre 2022, l’équipe de direction du lycée #Bascan a proposé des rencontres en #visioconférence aux parents des élèves des classes de #2de, #1re et #Tle. Pour celles et ceux qui n’ont pas pu y assister, nous mettons à disposition les enregistrements |→ https://lyc-bascan.fr/replay-des-visioconferences-de-rentree-proposees-par-la-direction-du-lycee-bascan/