PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/19-04:57:50
G01     66.2           32.2                3.3 +/-    0.53       5.5 +/-    0.53  0.050 / 0.110
G07     139.3          25.2                6.8 +/-    1.03      13.2 +/-    1.03  0.050 / 0.130
G11     50.1           26.6               -1.9 +/-    1.61      -3.6 +/-    1.61  0.040 / 0.060
G13     268.9          37.3                6.3 +/-    0.81       9.6 +/-    0.81  0.050 / 0.060
G15     300.3          15.2                0.7 +/-    1.50       1.8 +/-    1.50  0.090 / 0.250
G17     244.4          75.4                7.6 +/-    0.64       7.8 +/-    0.64  0.100 / 0.230
G18     43.6           13.7                1.3 +/-    1.43       3.4 +/-    1.43  0.080 / 0.100
G19     226.7          43.5                9.4 +/-    0.92      12.9 +/-    0.92  0.060 / 0.080
G28     22.3           59.2                5.3 +/-    0.62       6.0 +/-    0.62  0.040 / 0.040
G30     139.6          59.5                8.0 +/-    0.78       9.1 +/-    0.78  0.040 / 0.040