PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/06/20-16:27:50
G01     63.5           31.2                9.8 +/-    1.08      16.7 +/-    1.08  0.100 / 0.120
G07     139.8          21.4               13.6 +/-    0.80      28.9 +/-    0.80  0.070 / 0.120
G11     49.7           26.8                9.0 +/-    1.40      16.9 +/-    1.40  0.060 / 0.060
G13     266.2          37.3               13.3 +/-    0.94      20.3 +/-    0.94  0.050 / 0.050
G15     296.9          16.3               12.3 +/-    1.69      29.7 +/-    1.69  0.080 / 0.200
G17     242.5          72.1               14.0 +/-    0.76      14.6 +/-    0.76  0.070 / 0.170
G18     43.8           14.4                8.8 +/-    2.01      22.2 +/-    2.01  0.060 / 0.040
G19     228.0          48.3               14.0 +/-    0.88      18.0 +/-    0.88  0.080 / 0.050
G28     18.9           60.0               12.6 +/-    0.81      14.3 +/-    0.81  0.050 / 0.020
G30     140.5          53.5               11.8 +/-    0.56      14.3 +/-    0.56  0.050 / 0.030