diff --git a/minsar/additions/miaplpy/find_short_baselines.py b/minsar/additions/miaplpy/find_short_baselines.py
new file mode 100755
index 00000000..447315dd
--- /dev/null
+++ b/minsar/additions/miaplpy/find_short_baselines.py
@@ -0,0 +1,246 @@
+#!/usr/bin/env python3
+# Author: Sara Mirzaee
+
+import os
+import numpy as np
+import argparse
+from datetime import datetime
+from scipy.spatial import Delaunay
+
+def cmd_line_parse(iargs=None):
+    parser = argparse.ArgumentParser(description='find the minimum number of connected good interferograms')
+    parser.add_argument('-b', '--baselineDir', dest='baseline_dir', type=str, help='Baselines directory')
+    parser.add_argument('-o', '--outFile', dest='out_file', type=str, default='./bestints.txt', help='Output text file')
+    parser.add_argument('-r', '--baseline_ratio', dest='baseline_ratio', default=1, type=float,
+                        help='Ratio between temporal and perpendicular baseline (default = 1)')
+    parser.add_argument('-t', '--temporalBaseline', dest='t_threshold', default=120, type=int,
+                        help='Temporal baseline threshold')
+    parser.add_argument('-p', '--perpBaseline', dest='p_threshold', default=200, type=int,
+                        help='Perpendicular baseline threshold')
+    parser.add_argument('-d', '--date_list', dest='date_list', default=None, type=str,
+                        help='Text file having existing SLC dates')
+    #parser.add_argument('--MinSpanTree', dest='min_span_tree', action='store_true',
+    #                      help='Keep minimum spanning tree pairs')
+
+    inps = parser.parse_args(args=iargs)
+    return inps
+
+
+def find_baselines(iargs=None):
+    inps = cmd_line_parse(iargs)
+
+    baselines, dates0 = get_baselines_dict(inps.baseline_dir)
+    with open(inps.date_list, 'r') as f:
+        date_list = f.readlines()
+        date_list = [dd.split('\n')[0] for dd in date_list]
+
+    min_baselines = min(baselines.values())
+    max_baselines = max(baselines.values())
+
+    dates = []
+    for date in dates0:
+        if date in date_list:
+            dates.append(date)
+
+    dates = np.sort(dates)
+
+    days = [(datetime.strptime(date, '%Y%m%d') - datetime.strptime(dates[0], '%Y%m%d')).days for date in dates]
+
+    temp2perp_scale = np.abs((max_baselines - min_baselines) / (np.nanmin(np.array(days)) - np.nanmax(np.array(days))))
+    days = [tbase * temp2perp_scale for tbase in days]
+
+    inps.t_threshold *= temp2perp_scale
+    multplier = np.sqrt(inps.baseline_ratio)
+    days = [x / multplier for x in days]
+
+    pairtr = []
+    for i, date in enumerate(dates):
+        pairtr.append([days[i], baselines[date] * multplier])
+
+    pairtr = np.array(pairtr)
+    tri = Delaunay(pairtr, incremental=False)
+
+    qm = np.zeros([len(dates), len(dates)])
+
+    for trp in pairtr[tri.simplices]:
+        x1 = trp[0][0]
+        x2 = trp[1][0]
+        x3 = trp[2][0]
+        b1 = trp[0][1]
+        b2 = trp[1][1]
+        b3 = trp[2][1]
+        if np.abs(x1 - x2) <= inps.t_threshold:
+            qm[days.index(x1), days.index(x2)] = np.abs(b1 - b2)
+            qm[days.index(x2), days.index(x1)] = np.abs(b1 - b2)
+        if np.abs(x2 - x3) <= inps.t_threshold:
+            qm[days.index(x2), days.index(x3)] = np.abs(b2 - b3)
+            qm[days.index(x3), days.index(x2)] = np.abs(b2 - b3)
+        if np.abs(x1 - x3) <= inps.t_threshold:
+            qm[days.index(x1), days.index(x3)] = np.abs(b1 - b3)
+            qm[days.index(x3), days.index(x1)] = np.abs(b1 - b3)
+
+    qm[qm > inps.p_threshold] = 0
+
+    #if inps.min_span_tree:
+    #    X = csr_matrix(qm)
+    #    Tcsr = minimum_spanning_tree(X)
+    #    A = Tcsr.toarray()
+    #else:
+    #    for i in range(len(dates)):
+    #        if len(np.nonzero(qm[i, :])[0]) <= 1:
+    #            qm[i, :] = 0
+    #    A = np.triu(qm)
+
+    for i in range(len(dates)):
+        if len(np.nonzero(qm[i, :])[0]) <= 1:
+            qm[i, :] = 0
+    A = np.triu(qm)
+
+    ind1, ind2 = np.where(A > 0)
+    ifgdates = ['{}_{}\n'.format(dates[g], dates[h]) for g, h in zip(ind1, ind2)]
+
+    with open(inps.out_file, 'w') as f:
+        f.writelines(ifgdates)
+
+    plot_baselines(ind1=ind1, ind2=ind2, dates=dates, baselines=baselines,
+                   out_dir=os.path.dirname(inps.out_file))
+
+    return
+
+
+def get_baselines_dict(baseline_dir):
+
+    bf = os.listdir(baseline_dir)
+    if not bf[0].endswith('txt'):
+        bf2 = ['{}/{}.txt'.format(d, d) for d in bf]
+    else:
+        bf2 = bf
+
+    baselines = {}
+    reference = bf[0].split('_')[0]
+    baselines[reference] = 0
+    dates = [x.split('_')[1].split('.')[0] for x in bf]
+    dates.append(reference)
+
+    for d in bf2:
+        secondary = d.split('.txt')[0].split('_')[-1]
+        with open(os.path.join(baseline_dir, d), 'r') as f:
+            lines = f.readlines()
+            if len(lines) != 0:
+                if 'Bperp (average):' in lines[1]:
+                    baseline = float(lines[1].split('Bperp (average):')[1])
+                else:
+                    baseline = float(lines[1].split('PERP_BASELINE_TOP')[1])
+                # baselines.append(baseline)
+                baselines[secondary] = baseline
+    return baselines, dates
+
+
+def plot_baselines(ind1, ind2, dates=None, baselines=None, out_dir=None, baseline_dir=None):
+    import matplotlib.pyplot as plt
+    import matplotlib.dates as mdates
+    
+    years = mdates.YearLocator()
+    months = mdates.MonthLocator()
+    years_fmt = mdates.DateFormatter('%Y')
+
+    if not baseline_dir is None and baselines is None:
+        baselines = get_baselines_dict(baseline_dir)[0]
+
+    dates = np.sort(dates)
+
+    ifgdates = ['{}_{}, {}, {}, {}\n'.format(dates[g], dates[h], str(baselines[dates[g]]),
+                                             str(baselines[dates[h]]), str(baselines[dates[g]] - baselines[dates[h]]))
+                    for g, h in zip(ind1, ind2)]
+
+    plt.switch_backend('Agg')
+    fig = plt.figure(figsize=(8, 4))
+
+    for d in ifgdates:
+        X = d.split(',')[0].split('_')
+        x1 = datetime.strptime(X[0], '%Y%m%d')
+        x2 = datetime.strptime(X[1], '%Y%m%d')
+
+        Y = d.split('\n')[0].split(',')[1:3]
+        y1 = float(Y[0])
+        y2 = float(Y[1])
+        plt.plot([x1, x2], [y1, y2], 'ko-', markersize=10)
+
+    plt.xlabel('Time [years]')
+    plt.ylabel('Perp Baseline [m]')
+
+    ax = plt.gca()
+    ax.xaxis.set_major_locator(years)
+    ax.xaxis.set_major_formatter(years_fmt)
+    ax.xaxis.set_minor_locator(months)
+    ax.autoscale_view()
+
+    fig.savefig(out_dir + '/network.pdf', bbox_inches='tight', dpi=150)
+    plt.close(fig)
+
+    return
+
+def find_short_pbaseline_pair(baselines, date_list, ministack_size, last_index):
+
+    second_index = np.arange(last_index - ministack_size + 1, last_index)
+    diff_bselines = [np.abs(baselines[date_list[last_index - ministack_size - 2]] - baselines[date_list[i]]) for i in second_index]
+    min_ind = np.min(diff_bselines)
+    pair = (date_list[last_index - ministack_size - 2], date_list[second_index[diff_bselines.index(min_ind)]])
+    return pair
+
+
+def find_mini_stacks(date_list, baseline_dir, month=6):
+    pairs = []
+    dates = [datetime.strptime(date_str, '%Y%m%d') for date_str in date_list]
+    bperp = get_baselines_dict(baseline_dir)[0]
+    years = np.array([x.year for x in dates])
+    u, indices_first = np.unique(years, return_index=True)
+    f_ind = indices_first
+    l_ind = np.zeros(indices_first.shape, dtype=np.int)
+    l_ind[0:-1] = np.array(f_ind[1::]).astype(np.int)
+    l_ind[-1] = len(dates)
+    ref_inds = []
+    for i in range(len(f_ind)):
+        months = np.array([x.month for x in dates[f_ind[i]:l_ind[i]]])
+        u, indices = np.unique(months, return_index=True)
+        ind = np.where(u == month)[0]
+        if len(ind) == 0:
+            ind = int(len(u)//2)
+        else:
+            ind = ind[0]
+        ref_ind = indices[ind] + f_ind[i]
+        ref_inds.append(ref_ind)
+
+        for k in range(f_ind[i], l_ind[i]):
+            if not ref_ind == k:
+                pairs.append((date_list[ref_ind], date_list[k]))
+        ministack_size = l_ind[i] - f_ind[i]
+        if i > 0:
+            pairs.append(find_short_pbaseline_pair(bperp, date_list, ministack_size, l_ind[i]))
+
+    for i in range(len(ref_inds)-1):
+        pairs.append((date_list[ref_inds[i]], date_list[ref_inds[i+1]]))
+        pairs.append((date_list[l_ind[i]-1], date_list[l_ind[i]]))
+    return pairs
+
+def find_one_year_interferograms(date_list):
+    dates = np.array([datetime.datetime.strptime(date, '%Y%m%d') for date in date_list])
+
+    ifg_ind = []
+    for i, date in enumerate(dates):
+        range_1 = date + datetime.timedelta(days=365) - datetime.timedelta(days=5)
+        range_2 = date + datetime.timedelta(days=365) + datetime.timedelta(days=5)
+        index = np.where((dates >= range_1) * (dates <= range_2))[0]
+        if len(index) >= 1:
+            date_diff = list(dates[index] - (date + datetime.timedelta(days=365)))
+            ind = date_diff.index(np.nanmin(date_diff))
+            ind_date = index[ind]
+            date2 = date_list[ind_date]
+            ifg_ind.append((date_list[i], date2))
+
+    return ifg_ind
+
+if __name__ == '__main__':
+    find_baselines()
+
+