PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/14-10:58:10
G01     84.3           32.8                4.6 +/-    0.88       7.6 +/-    0.88  0.030 / 0.040
G07     129.9          40.4                5.4 +/-    0.68       7.8 +/-    0.68  0.030 / 0.040
G11     62.1           36.7                3.1 +/-    0.51       4.7 +/-    0.51  0.040 / 0.070
G13     288.3          37.5                2.4 +/-    1.10       3.7 +/-    1.10  0.040 / 0.060
G17     218.4          60.2                5.8 +/-    0.88       6.6 +/-    0.88  0.070 / 0.180
G18     57.6           22.0                1.2 +/-    1.79       2.5 +/-    1.79  0.060 / 0.210
G28     357.0          61.4                4.0 +/-    0.86       4.5 +/-    0.86  0.040 / 0.060
G30     116.8          73.9                5.3 +/-    0.95       5.5 +/-    0.95  0.050 / 0.060