Hey folks, I’m new to all this and I’ve just “logged” Observation 651895
For some reason, it came up as “good” after the scan, but there’s clearly no trace of a satellite anywhere in the recordings/waterfall/data image, so I’ve changed that to “bad”.
I’m pretty confident this was the right thing to do, but that’s mainly because the antenna I’ve got connected to the RTLSDR on the ground station is a rubber duck designed as a 1/4 wave for 868MHz (I’m going to be building a “proper” antenna soon, this was just so that there was “something” on the SDR to avoid any damage to the circuit!).
I’ve tried all of the USB ports - this is an old pi that I’ve had for a while now, and for some reason the ELEGOO 5" TFT that connects via the GPIO pins has shorted out the power controller ( see https://www.raspberrypi.org/forums/viewtopic.php?t=97858 for other people with similar issues).
I’ve switched the SD card into a Pi 2 B+ for now, and rtl_test returns the expected values, so I’m about to queue up another observation and see what happens!
No luck with the Pi 2, assuming that it’s down to the antenna now, so will build a proper one during the week.
Bought a new Pi 3 from Amazon, it was DOA, so back to Pi Supply for a proper unit.
Is it possible to run SATNOGS via Docker or similar? I’ve got a home server that I can easily map the USB devices from host to container, so that could work…
If someone is able to check and validate for me that would be appreciated - now that I’ve got the thing working, I need to start understanding what I’m looking at!
I think that is a “functional” observation, with no visible evidence of the satellite. I would vet this as “bad”, but since I’m not sure what the sat looks like - I’ll leave that to somebody else.
I’ve still only got a rubberduck antenna that’s meant to be tuned for 868MHz attached, so I’ll get a proper antenna attached in the coming days and see how well that improves things!
I agree with K3RLD. Software is tuning for calculated Doppler, so desired signal should be zero offset (or close) the entire pass. The off-center and S-curve of the signal on the left side of the waterfall is terrestrial. Looks like some of the garbage in my neighborhood. I am wondering if the apparent modulation suggests commercial pager?
I vetted this DIWATA-2 observation as bad: https://network.satnogs.org/observations/666544/ The weird cruft on the right is a new signal I have not seen before, and I think the brief burst +9 kHZ about 10-20 seconds in is from FOX-1C/AO95.
I’m hoping to get the kit to build a “proper” (non-rotator) antenna in the next couple of weeks - this is currently in my garage, next to my WiFi Access Point, a “SMETS1” Smart Meter, a LoRaWAN Gateway, and goodness knows what else that could be causing RF Interference!
My plan is to move it out of the garage, put a proper antenna on it, and (eventually) work my way up to the rotator model, but it’s good to know that the unit itself is working.
I’ll feed back with more once I’ve got a proper antenna on it