Hi Victor,

I've been using the -d option when operating in Client:Host mode. Client is on a Linux PC, Host is on a RPi3b+ with a 2020 Version of OS RPi. Here is the error:

python3 H-line.py -s 2400000 -r 11 -n 1000 -l 51 -g 0 -z 0 -a 51 -e 192.168.1.116 -m 3 -i 0 -d
Receiving 1000 bins of 2048 samples each...
Traceback (most recent call last):
  File "H-line.py", line 178, in <module>
    parser()
  File "H-line.py", line 45, in parser
    main(args)
  File "H-line.py", line 98, in main
    write_debug(freqs, data, args, ra, dec)
  File "H-line.py", line 155, in write_debug
    "Data": data.tolist()
AttributeError: 'list' object has no attribute 'tolist'

I haven't tested it in single machine operation, but in client/host the following fixes it, you obviously know better than me if it will fail in both modes, in which case I've over-engineered the answer. Maybe you can just remove the second .to list() from data.tolist()

Here it is:

  if not isinstance(data, list):
      data = data.tolist()
  data = {
      "Freqs": freqs.tolist(),
      "Data": data
  }

Good luck.

Kind regards

Steve.

In 12 .. 20 hours observations with four degrees intervals ( -n 50000 -i 4 .. ) I recognized that the RA coordinate adds irregularly +0.1° after ~5 .. ~18 measurement intervals.
Independent from this moving RA the DEC values go up and down (e.g. 29.2 ..29.1 .. 29.0 ..29.1 .. 29.2) also with a changing number of intervals inbetween the different DEC values.

I have no idea where this behaviour might come from.