PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/13-15:28:00
G01     78.1           33.3               11.5 +/-    1.20      18.8 +/-    1.20  0.030 / 0.040
G07     133.6          36.6               12.5 +/-    1.07      19.3 +/-    1.07  0.020 / 0.030
G11     58.1           34.3                9.2 +/-    0.77      14.8 +/-    0.77  0.060 / 0.100
G13     282.1          37.9               10.1 +/-    1.20      15.3 +/-    1.20  0.060 / 0.110
G15     309.6          12.4                7.9 +/-    2.67      20.9 +/-    2.67  0.050 / 0.130
G17     224.2          63.2               14.5 +/-    1.21      16.0 +/-    1.21  0.050 / 0.120
G18     53.9           20.8                8.9 +/-    2.40      19.3 +/-    2.40  0.060 / 0.100
G19     220.1          33.6               11.9 +/-    1.96      19.4 +/-    1.96  0.060 / 0.070
G28     8.4            60.6               11.0 +/-    0.51      12.4 +/-    0.51  0.040 / 0.060
G30     127.5          68.4               12.0 +/-    0.39      12.8 +/-    0.39  0.030 / 0.050