eclipswaarneming.py 3.35 KB
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#!/usr/bin/env python3

"""
Receive numbers from gnuradio (over UDP) at about 2 per second, plot them
against distance to to Sun or Cas A

Tammo Jan Dijkema, 29 June 2020
"""


import time
import matplotlib.pyplot as plt
import zmq
import struct
import numpy as np
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from telescope import Telescope
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from astropy.coordinates import get_sun, SkyCoord, AltAz, EarthLocation, Angle
from astropy.time import Time
import astropy.units as u
from matplotlib import cm
import matplotlib.dates as mdates
from threading import Thread

plt.ion()

import logging
logger = logging.getLogger()
logger.setLevel(level=logging.INFO)

signal = 0.
prev_signal = 0.

datafile = open(f"data{int(Time.now().unix)}.txt", "w")
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print("Time (UTC),Tracker,Offset az (deg),Offset el(deg),azimuth from north (deg),elevation (deg),signal 70cm,signal 23cm", file=datafile)
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def signal_thread():
    global signal
    context = zmq.Context()
    receiver = context.socket(zmq.PULL)
    receiver.connect("tcp://127.0.0.1:5557")
    while True:
        buff = receiver.recv()
        signal = np.frombuffer(buff, dtype="float32")[-1]

s = Thread(target=signal_thread)
s.daemon = True
s.start()

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dt = Telescope(consoleHost='localhost')
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dt.getAzEl(waitForUpdate=True)

dwl = EarthLocation(lon=Angle("6:23:46.21 degrees"),
                    lat=Angle("52:48:43.27 degrees"))

# create plot
plt.ion()
fig, ax = plt.subplots()

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starttime = Time.now() + 2 * u.hour

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#ax.set_ylim((0, None))
ax.set_xlabel("Lokale tijd (CEST)")
ax.set_ylabel("Signaalsterkte (ongekalibreerd)")
fig.canvas.set_window_title('Live radiowaarneming gedeeltelijke zonsverduistering')
ax.set_title('Live radiowaarneming gedeeltelijke zonsverduistering')

prev_points = None
separation = None
maxsignal = 0.

scatterplot_70cm = ax.scatter([], [], s=3, color='black')
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ax.xaxis.set_major_formatter(mdates.DateFormatter('%H:%M'))
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eclipse_starttime = Time("2021-06-10T11:21") + 2*u.hour
eclipse_endtime = Time("2021-06-10T13:34") + 2*u.hour
if starttime < eclipse_starttime < starttime + 3*u.hour:
    ax.axvline(eclipse_starttime.datetime, linestyle='--', linewidth=1, color='lightgrey')
    ax.text(eclipse_starttime.datetime,0.1,'Start: '+eclipse_starttime.isot[11:16],rotation=90, color='black', transform=ax.get_xaxis_transform())
if starttime < eclipse_endtime < starttime + 3*u.hour:
    ax.axvline(eclipse_endtime.datetime, linestyle='--', linewidth=1, color='lightgrey')
    ax.text(eclipse_endtime.datetime,0.1,'Einde: '+eclipse_endtime.isot[11:16],rotation=90, color='black', transform=ax.get_xaxis_transform())

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while True:
    time.sleep(0.2)
    if signal == prev_signal:
        continue
    prev_signal = signal

    now = Time.now()

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    print(now, dt.tracker.split("/")[-1], dt.offset_az.to(u.deg).value, dt.offset_el.to(u.deg).value, dt.az.to(u.deg).value, dt.el.to(u.deg).value, signal, flush=True, sep=',', file=datafile)
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    if signal > maxsignal:
        maxsignal = signal

    scatter_data = scatterplot_70cm.get_offsets()
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    scatter_data = np.vstack((scatter_data, [mdates.date2num((now + 2*u.hour).datetime), signal]))
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    scatterplot_70cm.set_offsets(scatter_data)

    if prev_points is not None:
        prev_points.remove()

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    prev_points = ax.scatter([(now+2*u.hour).datetime], [signal], s=50, color='red')
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    ax.set_ylim((2800, 1.1 * maxsignal))
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    ax.set_xlim(starttime.datetime, (now+2.5*u.hour).datetime)
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    # show the plot
    plt.show()
    plt.pause(0.0001)