Antenna Classification Daily Summary¶

by Josh Dillon last updated June 19, 2023

This notebook parses and summarizes the output of the file_calibration notebook to produce a report on per-antenna malfunctions on a daily basis.

Quick links:

• Summary of Per Antenna Issues¶

• Figure 1: Per File Overall Antenna Classification Summary¶

• Figure 2: Per Classifier Antenna Flagging Summary¶

• Figure 3: Array Visualization of Overall Daily Classification¶

In [1]:
import os
os.environ['HDF5_USE_FILE_LOCKING'] = 'FALSE'
import h5py
import hdf5plugin  # REQUIRED to have the compression plugins available
import numpy as np
import pandas as pd
import glob
import os
import matplotlib.pyplot as plt
from hera_cal import io, utils
from hera_qm import ant_class
from uvtools.plot import plot_antpos, plot_antclass
%matplotlib inline
from IPython.display import display, HTML
display(HTML("<style>.container { width:100% !important; }</style>"))
_ = np.seterr(all='ignore')  # get rid of red warnings
%config InlineBackend.figure_format = 'retina'

Settings¶

In [2]:
# Parse settings from environment
ANT_CLASS_FOLDER = os.environ.get("ANT_CLASS_FOLDER", "./")
SUM_FILE = os.environ.get("SUM_FILE", None)
# ANT_CLASS_FOLDER = "/mnt/sn1/2460330"
# SUM_FILE = "/mnt/sn1/2460330/zen.2460330.25463.sum.uvh5"
OC_SKIP_OUTRIGGERS = os.environ.get("OC_SKIP_OUTRIGGERS", "TRUE").upper() == "TRUE"

for param in ['ANT_CLASS_FOLDER', 'SUM_FILE', 'OC_SKIP_OUTRIGGERS']:
    print(f"{param} = '{eval(param)}'")

ANT_CLASS_FOLDER = '/mnt/sn1/data2/2460748'
SUM_FILE = '/mnt/sn1/data2/2460748/zen.2460748.46537.sum.uvh5'
OC_SKIP_OUTRIGGERS = 'True'
In [3]:
if SUM_FILE is not None:
    from astropy.time import Time, TimeDelta
    utc = Time(float(SUM_FILE.split('zen.')[-1].split('.sum.uvh5')[0]), format='jd').datetime
    print(f'Date: {utc.month}-{utc.day}-{utc.year}')

Date: 3-13-2025
In [4]:
# set thresholds for fraction of the day
overall_thresh = .1
all_zero_thresh = .1
eo_zeros_thresh = .1
xengine_diff_thresh = .1
cross_pol_thresh = .5
bad_fem_thresh = .1
high_power_thresh = .1
low_power_thresh = .1
low_corr_thresh = .1
bad_shape_thresh = .5
excess_rfi_thresh = .1
chisq_thresh = .25

Load classifications and other metadata¶

In [5]:
# Load csvs
csv_files = sorted(glob.glob(os.path.join(ANT_CLASS_FOLDER, '*.ant_class.csv')))
jds = [float(f.split('/')[-1].split('zen.')[-1].split('.sum')[0]) for f in csv_files]
tables = [pd.read_csv(f).dropna(axis=0, how='all') for f in csv_files]
table_cols = tables[0].columns[1::2]
class_cols = tables[0].columns[2::2]
print(f'Found {len(csv_files)} csv files starting with {csv_files[0]}')

Found 1787 csv files starting with /mnt/sn1/data2/2460748/zen.2460748.26628.sum.ant_class.csv
In [6]:
# parse ant_strings
ap_strs = np.array(tables[0]['Antenna'])
ants = sorted(set(int(a[:-1]) for a in ap_strs))
translator = ''.maketrans('e', 'n') | ''.maketrans('n', 'e')
In [7]:
# get node numbers
node_dict = {ant: 'Unknown' for ant in ants}
try:
    from hera_mc import cm_hookup
    hookup = cm_hookup.get_hookup('default')
    for ant_name in hookup:
        ant = int("".join(filter(str.isdigit, ant_name)))
        if ant in node_dict:
            if hookup[ant_name].get_part_from_type('node')['E<ground'] is not None:
                node_dict[ant] = int(hookup[ant_name].get_part_from_type('node')['E<ground'][1:])
except:
    pass
nodes = sorted(set(node_dict.values()))
In [8]:
def classification_array(col):
    class_array = np.vstack([t[col] for t in tables])
    class_array[class_array == 'good'] = 1.7
    class_array[class_array == 'suspect'] = 1
    class_array[class_array == 'bad'] = 0
    return class_array.astype(float)
In [9]:
if SUM_FILE is not None:
    hd = io.HERADataFastReader(SUM_FILE)
    ap_tuples = [(int(ap[:-1]), {'e': 'Jee', 'n': 'Jnn'}[ap[-1]]) for ap in ap_strs]
    bad_bools = np.mean(classification_array('Antenna Class') == 0, axis=0) > overall_thresh
    bad_aps = [ap_tuples[i] for i in np.arange(len(ap_tuples))[bad_bools]]
    suspect_bools = np.mean(classification_array('Antenna Class') == 1, axis=0) > overall_thresh
    suspect_aps = [ap_tuples[i] for i in np.arange(len(ap_tuples))[suspect_bools] if ap_tuples[i] not in bad_aps]
    good_aps = [ap for ap in ap_tuples if ap not in bad_aps and ap not in suspect_aps]
    overall_class = ant_class.AntennaClassification(bad=bad_aps, suspect=suspect_aps, good=good_aps)
    autos, _, _ = hd.read(bls=[bl for bl in hd.bls if utils.split_bl(bl)[0] == utils.split_bl(bl)[1]], read_flags=False, read_nsamples=False)
    avg_unflagged_auto = {}
    for pol in ['ee', 'nn']:
        unflagged_autos = [autos[bl] for bl in autos if bl[2] == pol and overall_class[utils.split_bl(bl)[0]] != 'bad']
        if len(unflagged_autos) > 0:
            avg_unflagged_auto[pol] = np.mean(unflagged_autos, axis=(0, 1))
        else:
            avg_unflagged_auto[pol] = np.zeros(len(hd.freqs), dtype=complex)

Figure out and summarize per-antenna issues¶

In [10]:
def print_issue_summary(bad_ant_strs, title, notes='', plot=False):
    '''Print report for list of bad antenna polarizations strings'''
    unique_bad_antnums = [int(ap[:-1]) for ap in bad_ant_strs]
    display(HTML(f'<h2>{title}: ({len(bad_ant_strs)} antpols across {len(set([ba[:-1] for ba in bad_ant_strs]))} antennas)</h2>'))
    if len(notes) > 0:
        display(HTML(f'<h4>{notes}</h4>'))
    if len(bad_ant_strs) > 0:
        print(f'All Bad Antpols: {", ".join(bad_ant_strs)}\n')
    for node in nodes:
        if np.any([node == node_dict[a] for a in unique_bad_antnums]):
            aps = [ap for ap in bad_ant_strs if node_dict[int(ap[:-1])] == node]
            whole_ants = [str(wa) for wa in set([int(ap[:-1]) for ap in aps if ap.translate(translator) in bad_ant_strs])]
            single_pols =  [ap for ap in aps if ap.translate(translator) not in bad_ant_strs]
            print(f'Node {node}:')
            print(f'\tAntpols ({len(aps)} total): {", ".join(aps)}')
            print(f'\tWhole Ants ({len(whole_ants)} total): {", ".join(whole_ants)}')
            print(f'\tSingle Pols ({len(single_pols)} total): {", ".join(single_pols)}')
            if plot and SUM_FILE is not None:
                fig, axes = plt.subplots(1, 2, figsize=(12,4), dpi=70, sharey=True, gridspec_kw={'wspace': 0})
                for ax, pol in zip(axes, ['ee', 'nn']):                    
                    ax.semilogy(autos.freqs / 1e6, avg_unflagged_auto[pol], 'k--', label='Average\nUnflagged\nAuto')
                    for ap in aps:
                        ant = int(ap[:-1]), utils.comply_pol(ap[-1])
                        auto_bl = utils.join_bl(ant, ant)
                        if auto_bl[2] == pol:
                            ax.semilogy(autos.freqs / 1e6, np.mean(autos[auto_bl], axis=0), label=ap)
                    ax.legend()
                    ax.set_xlim([40, 299])
                    ax.set_title(f'{title} on Node {node} ({pol}-antennas)')
                    ax.set_xlabel('Frequency (MHz)')
                axes[0].set_ylabel('Single File Raw Autocorrelation')
                plt.tight_layout()
                plt.show()
In [11]:
# precompute various helpful quantities
all_slopes = np.vstack([t['Autocorr Slope'] for t in tables])
median_slope = np.median(all_slopes)
bad_slopes = np.vstack([t['Autocorr Slope Class'] for t in tables]) == 'bad'
suspect_slopes = np.vstack([t['Autocorr Slope Class'] for t in tables]) == 'suspect'
bad_shapes = np.vstack([t['Autocorr Shape Class'] for t in tables]) == 'bad'
suspect_shapes = np.vstack([t['Autocorr Shape Class'] for t in tables]) == 'suspect'
all_powers = np.vstack([t['Autocorr Power'] for t in tables])
median_power = np.median(all_powers)
bad_powers = np.vstack([t['Autocorr Power Class'] for t in tables]) == 'bad'
suspect_powers = np.vstack([t['Autocorr Power Class'] for t in tables]) == 'suspect'
bad_rfi = np.vstack([t['Auto RFI RMS Class'] for t in tables]) == 'bad'
suspect_rfi = np.vstack([t['Auto RFI RMS Class'] for t in tables]) == 'suspect'
In [12]:
# find all zeros
all_zeros_strs = ap_strs[np.mean(np.vstack([t['Dead? Class'] for t in tables]) == 'bad', axis=0) > all_zero_thresh]
In [13]:
# find even/odd zeros
eo_zeros_strs = ap_strs[np.mean(np.vstack([t['Even/Odd Zeros Class'] for t in tables]) == 'bad', axis=0) > eo_zeros_thresh]
eo_zeros_strs = [ap for ap in eo_zeros_strs if ap not in all_zeros_strs]
In [14]:
# find cross-polarized antennas
cross_pol_strs = ap_strs[np.mean(np.vstack([t['Cross-Polarized Class'] for t in tables]) == 'bad', axis=0) > cross_pol_thresh]
cross_pol_strs = [ap for ap in cross_pol_strs if ap not in all_zeros_strs]
In [15]:
# find FEM power issues: must be low power, high slope, and bad or suspect in power, slope, rfi, and shape
fem_off_prod = (bad_powers + .5 * suspect_powers) * (bad_slopes + .5 * suspect_slopes)
fem_off_prod *= (bad_rfi + .5 * suspect_rfi) * (bad_shapes + .5 * suspect_shapes)
fem_off_strs = ap_strs[np.mean(fem_off_prod * (all_powers < median_power) * (all_slopes > median_slope), axis=0) > .1]
In [16]:
# find high power issues
high_power_strs = ap_strs[np.mean(bad_powers & (all_powers > median_power), axis=0) > high_power_thresh]
In [17]:
# find other low power issues
low_power_strs = ap_strs[np.mean(bad_powers & (all_powers < median_power), axis=0) > low_power_thresh]
low_power_strs = [ap for ap in low_power_strs if ap not in all_zeros_strs and ap not in fem_off_strs]
In [18]:
# find low correlation (but not low power)
low_corr_strs = ap_strs[np.mean(np.vstack([t['Low Correlation Class'] for t in tables]) == 'bad', axis=0) > low_corr_thresh]
low_corr_strs = [ap for ap in low_corr_strs if ap not in (set(low_power_strs) | set(all_zeros_strs) | set(fem_off_strs))]
In [19]:
# find bad bandpasses
bad_bandpass_strs = ap_strs[np.mean(bad_shapes, axis=0) > bad_shape_thresh]
bad_bandpass_strs = [ap for ap in bad_bandpass_strs if ap not in (set(low_power_strs) | set(all_zeros_strs) | set(high_power_strs) | set(fem_off_strs))]
In [20]:
# find antennas with excess RFI
excess_rfi_strs = ap_strs[np.mean(np.vstack([t['Auto RFI RMS Class'] for t in tables]) == 'bad', axis=0) > excess_rfi_thresh]
excess_rfi_strs = [ap for ap in excess_rfi_strs if ap not in (set(low_power_strs) | set(all_zeros_strs) |  set(fem_off_strs) |
                                                              set(bad_bandpass_strs) | set(high_power_strs))]
In [21]:
# find bad x-engine diffs
xengine_diff_strs = ap_strs[np.mean(np.vstack([t['Bad Diff X-Engines Class'] for t in tables]) == 'bad', axis=0) > xengine_diff_thresh]
xengine_diff_strs = [ap for ap in xengine_diff_strs if ap not in (set(bad_bandpass_strs) | set(low_power_strs) | set(excess_rfi_strs) | set(low_corr_strs) |
                                                                  set(all_zeros_strs) | set(high_power_strs) | set(fem_off_strs) | set(eo_zeros_strs))]
In [22]:
# find antennas with high redcal chi^2
chisq_strs = ap_strs[np.mean(np.vstack([t['Redcal chi^2 Class'] for t in tables]) == 'bad', axis=0) > chisq_thresh]
chisq_strs = [ap for ap in chisq_strs if ap not in (set(bad_bandpass_strs) | set(low_power_strs) | set(excess_rfi_strs) | set(low_corr_strs) |
                                                    set(all_zeros_strs) | set(high_power_strs) | set(fem_off_strs) | set(eo_zeros_strs) | set(xengine_diff_strs))]
if OC_SKIP_OUTRIGGERS:
    chisq_strs = [ap for ap in chisq_strs if int(ap[:-1]) < 320]
In [23]:
# collect all results
to_print = [(all_zeros_strs, 'All-Zeros', 'These antennas have visibilities that are more than half zeros.'),
            (eo_zeros_strs, 'Excess Zeros in Either Even or Odd Spectra', 
             'These antennas are showing evidence of packet loss or X-engine failure.', True),
            (xengine_diff_strs, 'Excess Power in X-Engine Diffs', 
             'These antennas are showing evidence of mis-written packets in either the evens or the odds.', True),            
            (cross_pol_strs, 'Cross-Polarized', 'These antennas have their east and north cables swapped.'),
            (fem_off_strs, 'Likely FEM Power Issue', 'These antennas have low power and anomolously high slopes.', True),
            (high_power_strs, 'High Power', 'These antennas have high median power.', True),
            (low_power_strs, 'Other Low Power Issues', 'These antennas have low power, but are not all-zeros and not FEM off.', True),
            (low_corr_strs, 'Low Correlation, But Not Low Power', 'These antennas are low correlation, but their autocorrelation power levels look OK.'),
            (bad_bandpass_strs, 'Bad Bandpass Shapes, But Not Bad Power', 
             'These antennas have unusual bandpass shapes, but are not all-zeros, high power, low power, or FEM off.', True),
            (excess_rfi_strs, 'Excess RFI', 'These antennas have excess RMS after DPSS filtering (likely RFI), but not low or high power or a bad bandpass.', True),
            (chisq_strs, 'Redcal chi^2', 'These antennas have been idenfied as not redundantly calibrating well, even after passing the above checks.')]
In [24]:
def print_high_level_summary():
    for tp in sorted(to_print, key=lambda x: len(x[0]), reverse=True):
        print(f'{len(tp[0])} antpols (on {len(set([ap[:-1] for ap in tp[0]]))} antennas) frequently flagged for {tp[1]}.')
        
def print_all_issue_summaries():
    for tp in to_print:
        print_issue_summary(*tp)

Summary of Per-Antenna Issues¶

In [25]:
print_high_level_summary()

90 antpols (on 76 antennas) frequently flagged for Excess Power in X-Engine Diffs.
44 antpols (on 40 antennas) frequently flagged for Excess RFI.
30 antpols (on 15 antennas) frequently flagged for All-Zeros.
27 antpols (on 23 antennas) frequently flagged for Redcal chi^2.
22 antpols (on 20 antennas) frequently flagged for Likely FEM Power Issue.
13 antpols (on 13 antennas) frequently flagged for Bad Bandpass Shapes, But Not Bad Power.
9 antpols (on 8 antennas) frequently flagged for Other Low Power Issues.
9 antpols (on 9 antennas) frequently flagged for Low Correlation, But Not Low Power.
6 antpols (on 5 antennas) frequently flagged for High Power.
4 antpols (on 2 antennas) frequently flagged for Cross-Polarized.
0 antpols (on 0 antennas) frequently flagged for Excess Zeros in Either Even or Odd Spectra.
In [26]:
print_all_issue_summaries()

All-Zeros: (30 antpols across 15 antennas)

These antennas have visibilities that are more than half zeros.

All Bad Antpols: 115e, 115n, 131e, 131n, 133e, 133n, 147e, 147n, 148e, 148n, 149e, 149n, 150e, 150n, 167e, 167n, 168e, 168n, 169e, 169n, 170e, 170n, 188e, 188n, 189e, 189n, 190e, 190n, 191e, 191n

Node 11:
	Antpols (6 total): 115e, 115n, 131e, 131n, 133e, 133n
	Whole Ants (3 total): 115, 131, 133
	Single Pols (0 total): 
Node 15:
	Antpols (24 total): 147e, 147n, 148e, 148n, 149e, 149n, 150e, 150n, 167e, 167n, 168e, 168n, 169e, 169n, 170e, 170n, 188e, 188n, 189e, 189n, 190e, 190n, 191e, 191n
	Whole Ants (12 total): 167, 168, 169, 170, 147, 148, 149, 150, 188, 189, 190, 191
	Single Pols (0 total):

Excess Zeros in Either Even or Odd Spectra: (0 antpols across 0 antennas)

These antennas are showing evidence of packet loss or X-engine failure.

Excess Power in X-Engine Diffs: (90 antpols across 76 antennas)

These antennas are showing evidence of mis-written packets in either the evens or the odds.

All Bad Antpols: 5e, 17e, 20e, 28n, 29e, 30e, 31e, 37e, 43n, 44n, 50e, 53e, 54e, 56e, 56n, 57e, 57n, 59e, 67e, 68e, 70e, 70n, 71e, 72e, 81e, 82e, 83e, 83n, 87n, 91n, 92e, 92n, 93e, 96n, 98e, 99e, 100e, 100n, 103n, 108e, 114e, 116e, 116n, 119e, 119n, 122e, 124e, 128n, 130e, 130n, 134e, 137n, 144n, 153n, 157e, 158e, 159e, 163e, 165e, 174e, 175e, 180e, 181e, 181n, 183e, 183n, 186n, 198n, 207n, 208n, 209e, 209n, 214e, 214n, 223n, 235n, 237e, 244n, 245n, 251n, 261n, 267e, 268e, 295e, 295n, 321e, 323e, 327e, 333n, 340n

Node 1:
	Antpols (5 total): 5e, 17e, 28n, 29e, 30e
	Whole Ants (0 total): 
	Single Pols (5 total): 5e, 17e, 28n, 29e, 30e
No description has been provided for this image 
Node 2:
	Antpols (4 total): 20e, 31e, 321e, 323e
	Whole Ants (0 total): 
	Single Pols (4 total): 20e, 31e, 321e, 323e
No description has been provided for this image 
Node 3:
	Antpols (5 total): 37e, 50e, 53e, 67e, 68e
	Whole Ants (0 total): 
	Single Pols (5 total): 37e, 50e, 53e, 67e, 68e
No description has been provided for this image 
Node 4:
	Antpols (9 total): 54e, 56e, 56n, 57e, 57n, 70e, 70n, 71e, 72e
	Whole Ants (3 total): 56, 57, 70
	Single Pols (3 total): 54e, 71e, 72e
No description has been provided for this image 
Node 5:
	Antpols (3 total): 43n, 44n, 59e
	Whole Ants (0 total): 
	Single Pols (3 total): 43n, 44n, 59e
No description has been provided for this image 
Node 7:
	Antpols (13 total): 81e, 82e, 83e, 83n, 98e, 99e, 100e, 100n, 116e, 116n, 119e, 119n, 137n
	Whole Ants (4 total): 116, 83, 100, 119
	Single Pols (5 total): 81e, 82e, 98e, 99e, 137n
No description has been provided for this image 
Node 8:
	Antpols (3 total): 87n, 103n, 122e
	Whole Ants (0 total): 
	Single Pols (3 total): 87n, 103n, 122e
No description has been provided for this image 
Node 9:
	Antpols (3 total): 91n, 108e, 124e
	Whole Ants (0 total): 
	Single Pols (3 total): 91n, 108e, 124e
No description has been provided for this image 
Node 10:
	Antpols (6 total): 92e, 92n, 93e, 128n, 130e, 130n
	Whole Ants (2 total): 130, 92
	Single Pols (2 total): 93e, 128n
No description has been provided for this image 
Node 11:
	Antpols (3 total): 96n, 114e, 134e
	Whole Ants (0 total): 
	Single Pols (3 total): 96n, 114e, 134e
No description has been provided for this image 
Node 12:
	Antpols (3 total): 157e, 158e, 333n
	Whole Ants (0 total): 
	Single Pols (3 total): 157e, 158e, 333n
No description has been provided for this image 
Node 13:
	Antpols (6 total): 159e, 180e, 181e, 181n, 183e, 183n
	Whole Ants (2 total): 181, 183
	Single Pols (2 total): 159e, 180e
No description has been provided for this image 
Node 14:
	Antpols (4 total): 144n, 163e, 165e, 186n
	Whole Ants (0 total): 
	Single Pols (4 total): 144n, 163e, 165e, 186n
No description has been provided for this image 
Node 16:
	Antpols (2 total): 153n, 174e
	Whole Ants (0 total): 
	Single Pols (2 total): 153n, 174e
No description has been provided for this image 
Node 17:
	Antpols (2 total): 198n, 235n
	Whole Ants (0 total): 
	Single Pols (2 total): 198n, 235n
No description has been provided for this image 
Node 18:
	Antpols (1 total): 237e
	Whole Ants (0 total): 
	Single Pols (1 total): 237e
No description has been provided for this image 
Node 19:
	Antpols (2 total): 207n, 223n
	Whole Ants (0 total): 
	Single Pols (2 total): 207n, 223n
No description has been provided for this image 
Node 20:
	Antpols (6 total): 208n, 209e, 209n, 244n, 245n, 261n
	Whole Ants (1 total): 209
	Single Pols (4 total): 208n, 244n, 245n, 261n
No description has been provided for this image 
Node 21:
	Antpols (5 total): 175e, 214e, 214n, 327e, 340n
	Whole Ants (1 total): 214
	Single Pols (3 total): 175e, 327e, 340n
No description has been provided for this image 
Node 22:
	Antpols (5 total): 251n, 267e, 268e, 295e, 295n
	Whole Ants (1 total): 295
	Single Pols (3 total): 251n, 267e, 268e
No description has been provided for this image

Cross-Polarized: (4 antpols across 2 antennas)

These antennas have their east and north cables swapped.

All Bad Antpols: 57e, 57n, 70e, 70n

Node 4:
	Antpols (4 total): 57e, 57n, 70e, 70n
	Whole Ants (2 total): 57, 70
	Single Pols (0 total):

Likely FEM Power Issue: (22 antpols across 20 antennas)

These antennas have low power and anomolously high slopes.

All Bad Antpols: 4e, 10n, 44e, 75e, 75n, 104n, 109n, 112e, 135e, 143n, 164n, 171n, 200e, 216n, 218e, 238n, 239e, 322e, 326n, 329n, 332e, 332n

Node 1:
	Antpols (1 total): 4e
	Whole Ants (0 total): 
	Single Pols (1 total): 4e
No description has been provided for this image 
Node 2:
	Antpols (1 total): 10n
	Whole Ants (0 total): 
	Single Pols (1 total): 10n
No description has been provided for this image 
Node 5:
	Antpols (4 total): 44e, 75e, 75n, 322e
	Whole Ants (1 total): 75
	Single Pols (2 total): 44e, 322e
No description has been provided for this image 
Node 8:
	Antpols (1 total): 104n
	Whole Ants (0 total): 
	Single Pols (1 total): 104n
No description has been provided for this image 
Node 10:
	Antpols (2 total): 109n, 112e
	Whole Ants (0 total): 
	Single Pols (2 total): 109n, 112e
No description has been provided for this image 
Node 12:
	Antpols (2 total): 135e, 329n
	Whole Ants (0 total): 
	Single Pols (2 total): 135e, 329n
No description has been provided for this image 
Node 14:
	Antpols (2 total): 143n, 164n
	Whole Ants (0 total): 
	Single Pols (2 total): 143n, 164n
No description has been provided for this image 
Node 16:
	Antpols (1 total): 171n
	Whole Ants (0 total): 
	Single Pols (1 total): 171n
No description has been provided for this image 
Node 17:
	Antpols (2 total): 216n, 218e
	Whole Ants (0 total): 
	Single Pols (2 total): 216n, 218e
No description has been provided for this image 
Node 18:
	Antpols (3 total): 200e, 238n, 239e
	Whole Ants (0 total): 
	Single Pols (3 total): 200e, 238n, 239e
No description has been provided for this image 
Node 21:
	Antpols (3 total): 326n, 332e, 332n
	Whole Ants (1 total): 332
	Single Pols (1 total): 326n
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High Power: (6 antpols across 5 antennas)

These antennas have high median power.

All Bad Antpols: 8e, 8n, 31n, 125n, 232e, 272e

Node 2:
	Antpols (3 total): 8e, 8n, 31n
	Whole Ants (1 total): 8
	Single Pols (1 total): 31n
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Node 9:
	Antpols (1 total): 125n
	Whole Ants (0 total): 
	Single Pols (1 total): 125n
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Node 21:
	Antpols (1 total): 232e
	Whole Ants (0 total): 
	Single Pols (1 total): 232e
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Node 23:
	Antpols (1 total): 272e
	Whole Ants (0 total): 
	Single Pols (1 total): 272e
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Other Low Power Issues: (9 antpols across 8 antennas)

These antennas have low power, but are not all-zeros and not FEM off.

All Bad Antpols: 81n, 82n, 99n, 137e, 176n, 218n, 251e, 262e, 262n

Node 7:
	Antpols (4 total): 81n, 82n, 99n, 137e
	Whole Ants (0 total): 
	Single Pols (4 total): 81n, 82n, 99n, 137e
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Node 12:
	Antpols (1 total): 176n
	Whole Ants (0 total): 
	Single Pols (1 total): 176n
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Node 17:
	Antpols (1 total): 218n
	Whole Ants (0 total): 
	Single Pols (1 total): 218n