PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/23-14:43:10
G01     79.8           33.2                9.7 +/-    0.66      15.9 +/-    0.66  0.030 / 0.040
G07     132.6          37.9                9.8 +/-    1.21      14.8 +/-    1.21  0.030 / 0.040
G11     59.2           35.0                9.7 +/-    0.60      15.4 +/-    0.60  0.060 / 0.110
G13     283.9          37.8                9.5 +/-    0.86      14.3 +/-    0.86  0.060 / 0.110
G15     311.1          11.7                5.8 +/-    1.98      15.6 +/-    1.98  0.040 / 0.110
G17     222.5          62.3               12.5 +/-    0.91      13.9 +/-    0.91  0.050 / 0.120
G18     55.1           21.2                8.6 +/-    1.38      18.4 +/-    1.38  0.040 / 0.060
G19     219.2          32.1               10.8 +/-    0.51      18.1 +/-    0.51  0.040 / 0.060
G28     5.6            60.8               10.3 +/-    0.65      11.6 +/-    0.65  0.050 / 0.060
G30     124.9          70.0                9.5 +/-    0.80      10.0 +/-    0.80  0.050 / 0.080