Created
June 8, 2022 13:08
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Plot photons against SlideRule elevations with the x-axis being distance in order to verify distance alignment.
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# Imports | |
from sliderule import icesat2 | |
import matplotlib.pyplot as plt | |
import numpy as np | |
import logging | |
# Settings | |
url = "icesat2sliderule.org" | |
asset = "nsidc-s3" | |
verbose = True | |
# Initialize Client | |
icesat2.init(url, verbose=verbose) | |
# ATL03 Subsetting Parameters | |
poly = [{'lon': -20.372964324492575, 'lat': 78.47400837990965}, | |
{'lon': -20.263346363064308, 'lat': 78.46393546381341}, | |
{'lon': -20.210487946975864, 'lat': 78.48683542224246}, | |
{'lon': -20.320279015854357, 'lat': 78.49692891286226}, | |
{'lon': -20.372964324492575, 'lat': 78.47400837990965}] | |
rgt = 870 | |
params_03 = {'poly':poly, | |
'cnf':0, | |
'rgt': rgt, | |
'cycle':4, | |
'yapc':{"knn":0, "win_h":3, "win_x":15}, | |
'pass_invalid':True} | |
# Run SlideRule ATL03 Subsetter | |
D3 = icesat2.atl03sp(params_03, asset=asset) | |
# ATL06 Parameters | |
L = 20 | |
res = L/4 | |
params_06 = {'poly':poly, | |
'cnf':0, | |
'len':L, | |
'res':res, | |
'ats':L/2, | |
'cnt':10, | |
'rgt':rgt, | |
'cycle':4, | |
'maxi': 10, | |
'yapc':{"score":190, "knn":0, "win_h":3, "win_x":15}, | |
'pass_invalid':False} | |
# Run SlideRule ATL06-SR | |
D6 = icesat2.atl06p(params_06, asset=asset) | |
# Interactive Matlibplots (for juypter lab) | |
# %matplotlib widget | |
# Plot Elevations overtop Photons (points) | |
plt.figure() | |
D3s = D3[D3["spot"] == 4] | |
plt.scatter(D3s['segment_dist']+D3s['distance'], D3s['height'], 2, c=D3s['yapc_score'], vmin=100, vmax=255); plt.colorbar() | |
D6s = D6[D6["spot"] == 4] | |
plt.plot(D6s['distance'], D6s['h_mean'], 'k', linewidth=2) | |
plt.show() |
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