PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/31-03:57:40
G01     72.1           33.0                4.5 +/-    1.37       7.5 +/-    1.37  0.050 / 0.090
G07     136.6          29.5                5.1 +/-    1.02       9.0 +/-    1.02  0.050 / 0.080
G11     53.2           30.2                4.3 +/-    1.57       7.5 +/-    1.57  0.060 / 0.080
G13     275.4          38.1                5.4 +/-    1.43       8.0 +/-    1.43  0.070 / 0.080
G15     304.4          14.5                0.6 +/-    1.87       1.6 +/-    1.87  0.060 / 0.070
G17     231.8          71.1                6.1 +/-    0.46       6.4 +/-    0.46  0.060 / 0.060
G18     47.0           16.2                2.3 +/-    3.08       5.6 +/-    3.08  0.290 / 0.400
G19     222.9          39.1                5.4 +/-    1.43       8.0 +/-    1.43  0.200 / 0.300
G28     12.7           60.3                3.8 +/-    1.44       4.3 +/-    1.44  0.040 / 0.050
G30     134.4          64.3                6.3 +/-    0.46       6.9 +/-    0.46  0.050 / 0.040