Andrew Garratt M0NRD 📻
@nerdsvilleCurmudgeonly software engineer with an interest in all things radio related. Licensed Radio Amateur operator call signs M0NRD/2E0NRD/M6GTG
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Watch live as he discusses possible solutions to the paradox at: youtube.com/live/R7AYzFOIz…
Relocated my @tiny__GS station recently and got all excited by the increased daily number of received LoRa packets. Looks like it might have been temporary (or a change in working satellites, not been keeping abreast of developments)
👽 👽 👽 Are we alone in the Universe? And if not, where are the aliens? That is the topic of today's @RoyalAstroSoc Public Talk! In-person registration is now closed but you can still watch what Professor Ian Crawford has to say during the 1pm talk at: youtube.com/live/-2qkqAbTa…
The excitement of Monday BBC2 quiz night is too much for Bertie
Moved to a slightly bigger dish for my Hydrogen Line drift scanning experiment. Elevation isn't quite as high but more confident the receiving element is at the focal point - cold sky calibration done - now just got to wait for Milky Way dish to pass across.
Tickets are going fast for our Public Talk on #extraterrestrial life next week. Want to come along? Hear what Professor Ian Crawford has to say about the Fermi Paradox by booking a FREE place on Tuesday 19 November. There are two lectures, at 13:00 and 18:00 GMT...
Has the December issue of @theRSGB Radcom magazine been posted out? If so I appear not to have received it.
That job you planned to do over the summer, re-roof the shack! Didn't get round to it and noticed it has sprung a leak. Thankfully I have an old big tarpaulin.
Strong M-Class flare recorded by my SID detector this morning (can be seen on GOES-16)
Seems like the 'soundcard' SID detector is also working, seeing correlation between strength of received VLF transmissions and the X-Ray flux as recorded by the GOES satellite - no X class flares yet (bottom graph produced by the SpectrumLab software, stretch to line up)
Hydrogen Line detection overnight (Stellarium generating the sky view) dish pointing west at about 70° elevation) #radioastronomy
SID detector progress.. Need to fully understand settings, but the loop is built and working, simply connected directly to soundcard input. Didn't realise this old Dell computer had a decent built in dual channel 192kHz ADC device so can monitor VLF transmissions up to 96kHz.
Another "radio astronomy" project underway, a Sudden Ionospheric Disturbance (SID) detector. Frame for loop built, now to wind 200m of wire round it.
Time-lapse from 9pm to 9am overnight (dish initially pointed to one side of the Milky Way) Clear hump of Hydrogen Line emissions, strength increases then fades as line of sight passed across galactic disc. Radio astronomy for < £100 😀now to improve the setup.
First attempt at rx'ing milky way hydrogen line emission was a failure! So lashed up another antenna last night using an old 60cm sky satellite dish with a 21cm loop, I'm missing the LNB fitting so approximated the position and pointed NW, definitely got something?
"The weirdo next door is at it again!" Apparently he is trying to do some radio astronomy!
Sorry but the Internet has ruined me... spotted in a copy of the Waitrose weekend newspaper 📷
SDR and LNA-Filter arrived for my Hydrogen Line receiver project (not Helium as previous tweeted Doh!) modifying a largish parabolic grid antenna I have, its existing PCB 'pigtail' is 2.4GHz, so replacing with something homebrew - but interesting to see how it is constructed.
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