PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/31-03:58:00
G01     72.1           33.0                4.4 +/-    0.89       7.3 +/-    0.89  0.070 / 0.120
G07     136.6          29.5                5.0 +/-    0.68       8.9 +/-    0.68  0.080 / 0.120
G11     53.2           30.2                4.2 +/-    0.45       7.4 +/-    0.45  0.040 / 0.060
G13     275.4          38.1                5.7 +/-    1.49       8.6 +/-    1.49  0.040 / 0.060
G15     304.4          14.5                0.2 +/-    3.31       0.5 +/-    3.31  0.160 / 0.330
G17     231.8          71.1                5.8 +/-    0.49       6.1 +/-    0.49  0.140 / 0.390
G18     47.0           16.2                2.8 +/-    1.27       6.7 +/-    1.27  0.060 / 0.120
G19     222.9          39.1                5.5 +/-    1.28       8.2 +/-    1.28  0.080 / 0.090
G28     12.7           60.3                4.3 +/-    0.64       4.9 +/-    0.64  0.030 / 0.040
G30     134.4          64.3                6.4 +/-    0.74       7.0 +/-    0.74  0.040 / 0.030