220 lines
8.3 KiB
Python
220 lines
8.3 KiB
Python
#!/usr/bin/env python3
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import sys
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import argparse
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import os
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import numpy as np
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from strf.rfio import Spectrogram, get_site_info, get_frequency_info, get_satellite_info
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import matplotlib.pyplot as plt
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import matplotlib.dates as mdates
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from matplotlib.backend_bases import MouseButton
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from matplotlib.widgets import RectangleSelector
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import matplotlib as mpl
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from skyfield.api import EarthSatellite
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from skyfield.api import load, wgs84, utc
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from modest import imshow
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if __name__ == "__main__":
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plt.style.use('dark_background')
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mpl.rcParams['keymap.save'].remove('s')
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mpl.rcParams['keymap.fullscreen'].remove('f')
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mpl.rcParams['backend'] = "TkAgg"
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parser = argparse.ArgumentParser(description='rfplot: plot RF observations', formatter_class=argparse.ArgumentDefaultsHelpFormatter)
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parser.add_argument('-p', help='Input path to parent directory /a/b/')
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parser.add_argument('-P', help='Filename prefix c in c_??????.bin')
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parser.add_argument('-s', type=int, default=0, help='Number of starting subintegration')
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parser.add_argument('-l', type=int, default=3600, help='Number of subintegrations to plot')
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parser.add_argument('-C', type=int, help='Site ID', default=4171)
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parser.add_argument('-F', help='List with frequencies')
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args = parser.parse_args()
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if "ST_DATADIR" not in os.environ:
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print("ST_DATADIR variable not found")
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sys.exit(1)
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site_fname = os.path.join(os.environ["ST_DATADIR"], "data", "sites.txt")
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if not os.path.exists(site_fname):
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print(f"Sites file not available under {site_fname}")
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sys.exit(1)
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site = get_site_info(site_fname, args.C)
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if site is None:
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print(f"Site with no: {args.C} does not exist")
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sys.exit(1)
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site_location = wgs84.latlon(site["lat"], site["lon"], site["height"])
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if args.F is not None:
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freq_fname = args.F
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else:
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freq_fname = os.path.join(os.environ["ST_DATADIR"], "data", "frequencies.txt")
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if "ST_TLEDIR" not in os.environ:
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print("ST_TLEDIR variable not found")
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sys.exit(1)
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tle_fname = os.path.join(os.environ["ST_TLEDIR"], "bulk.tle")
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# Read spectrogram
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s = Spectrogram(args.p, args.P, args.s, args.l, args.C)
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# Create plot
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vmin, vmax = np.percentile(s.z, (5, 99.95))
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# Time limits
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tmin, tmax = mdates.date2num(s.t[0]), mdates.date2num(s.t[-1])
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# Frequency limits
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fcen = np.mean(s.freq)
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fmin, fmax = (s.freq[0] - fcen) * 1e-6, (s.freq[-1] - fcen) * 1e-6
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ts = load.timescale()
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frequencies = []
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satellite_info = []
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if not os.path.exists(freq_fname):
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print(f"warning: Frequencies file not available under {freq_fname}")
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else:
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frequencies = get_frequency_info(freq_fname, fcen, s.freq[0], s.freq[-1])
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if not os.path.exists(tle_fname):
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print(f"TLE data not available under {tle_fname}")
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sys.exit(1)
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names = ('rise', 'culminate', 'set')
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t0,t1 = ts.utc(s.t[0].replace(tzinfo=utc)), ts.utc(s.t[-1].replace(tzinfo=utc))
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satellite_info = get_satellite_info(tle_fname, frequencies)
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print(f"Found {len(frequencies)} matching satellites")
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fig, ax = plt.subplots(figsize=(10, 6))
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mark = ax.scatter([], [],c="white",s=5)
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line_fitting = ax.scatter([], [], edgecolors="yellow",s=10, facecolors='none')
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# imshow(ax, s.z, vmin=vmin, vmax=vmax)
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timestamps = [ x.replace(tzinfo=utc) for x in s.t]
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for sat_info in satellite_info:
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satellite = EarthSatellite(sat_info["tle"][-2], sat_info["tle"][-1])
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t, events = satellite.find_events(site_location, t0, t1, altitude_degrees=0.0)
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if len(t) > 0:
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pairs = [ (ti, event) for ti, event in zip(t, events)]
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if pairs[0][1] in [1,2]:
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pairs = [ (t0, 0) ] + pairs # pad with rise
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if pairs[-1][1] in [0, 1]:
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pairs = pairs + [ (t1, 2) ] # pad with set
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pairs = [ (ti, event) for ti, event in pairs if event != 1 ] # remove culminations
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sat_info["timeslot"] = [ (pairs[i][0].utc_datetime(), pairs[i+1][0].utc_datetime()) for i in range(0, len(pairs), 2)]
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for timeslot in sat_info["timeslot"]:
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selected_timestamps = [ x for x in timestamps if x >= timeslot[0] and x <= timeslot[1]]
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pos = (satellite - site_location).at(ts.utc(selected_timestamps))
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_, _, _, _, _, range_rate = pos.frame_latlon_and_rates(site_location)
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C = 299792.458 # km/s
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for freq in sat_info["frequencies"]:
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freq1 = (freq - fcen * 1e-6)
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dfreq = freq1 - range_rate.km_per_s / C * freq # MHz
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tt = [mdates.date2num(x) for x in selected_timestamps]
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ax.plot(tt, dfreq,c="lime")
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ax.text(tt[0], dfreq[0], sat_info["noradid"],c="lime")
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image = imshow(ax, s.z, origin="lower", aspect="auto", interpolation="None",
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vmin=vmin, vmax=vmax,
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extent=[tmin, tmax, fmin, fmax])
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mode = {
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"current_mode" : None,
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"vmin" : vmin,
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"vmax" : vmax
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}
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def line_select_callback(eclick, erelease):
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x1, y1 = eclick.xdata, eclick.ydata
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x2, y2 = erelease.xdata, erelease.ydata
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if mode["current_mode"] =="fit":
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t1_ind = round(len(s.t) * (x1 - tmin) / (tmax - tmin))
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t2_ind = round(len(s.t) * (x2 - tmin) / (tmax - tmin))
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f1_ind = round(len(s.freq) * (y1 - fmin) / (fmax - fmin))
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f2_ind = round(len(s.freq) * (y2 - fmin) / (fmax - fmin))
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submat = s.z[f1_ind:f2_ind,t1_ind:t2_ind]
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# TODO perform some action on submat
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elif mode["current_mode"] == "delete":
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array = mark.get_offsets()
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maskx = np.logical_and(array[:,0] >= min(x1,x2), array[:,0] <= max(x1,x2))
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masky = np.logical_and(array[:,1] >= min(y1,y2), array[:,1] <= max(y1,y2))
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mask = np.logical_and(maskx, masky)
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mark.set_offsets(array[np.logical_not(mask),:])
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fig.canvas.draw()
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current_mode = mode["current_mode"]
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print(f"select over {x1},{y1},{x2},{y2} in {current_mode} mode")
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selector = RectangleSelector(ax, line_select_callback, useblit=True, button=[1], minspanx=5, minspany=5, spancoords='pixels',props={'edgecolor':'white', 'fill': False})
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selector.active = False
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ax.xaxis_date()
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date_format = mdates.DateFormatter("%F\n%H:%M:%S")
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ax.xaxis.set_major_formatter(date_format)
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fig.autofmt_xdate(rotation=0, ha="center")
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ax.set_xlabel("Time (UTC)")
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ax.set_ylabel(f"Frequency (MHz) - {fcen * 1e-6:g} MHz")
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def add_point(scatter, point):
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array = scatter.get_offsets()
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print(array)
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array = np.vstack([array, point])
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scatter.set_offsets(array)
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fig.canvas.draw()
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def handle(key, x, y):
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print(f"pressed {key} over x={x} y={y}")
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if key == "d":
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selector.active = True
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mode["current_mode"] = "delete"
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elif key == "s":
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point = (x, y)
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add_point(line_fitting, point)
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elif key == "f":
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print("performing fitting on")
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mode["current_mode"] = "fit"
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selector.active = True
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print(line_fitting.get_offsets())
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elif key == "r":
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print("performing reset")
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mode["current_mode"] = None
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selector.active = False
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mark.set_offsets(np.empty((0, 2), float))
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line_fitting.set_offsets(np.empty((0, 2), float))
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fig.canvas.draw()
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elif key == "b":
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mode["vmax"] *= 0.95
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image.set_clim(mode["vmin"],mode["vmax"])
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fig.canvas.draw()
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elif key == "v":
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mode["vmax"] *= 1.05
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image.set_clim(mode["vmin"],mode["vmax"])
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fig.canvas.draw()
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sys.stdout.flush()
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def on_press(event):
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handle(event.key, event.xdata, event.ydata)
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sys.stdout.flush()
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def on_click(event):
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if event.button is MouseButton.MIDDLE:
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point = (event.xdata, event.ydata)
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add_point(mark, point)
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print(f"{event.xdata} {fcen + event.ydata}")
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sys.stdout.flush()
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fig.canvas.mpl_connect('key_press_event', on_press)
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fig.canvas.mpl_connect('button_press_event', on_click)
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plt.show()
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