PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/25-18:42:50
G01     81.2           33.2               12.1 +/-    0.70      19.8 +/-    0.70  0.140 / 0.190
G07     131.8          39.2               14.1 +/-    0.73      20.7 +/-    0.73  0.120 / 0.240
G11     61.3           36.7               11.4 +/-    0.42      17.6 +/-    0.42  0.040 / 0.080
G13     285.6          37.5               14.0 +/-    1.19      21.2 +/-    1.19  0.040 / 0.080
G15     310.4          12.5               11.7 +/-    1.02      30.8 +/-    1.02  0.030 / 0.030
G17     221.5          58.2               16.9 +/-    0.66      19.5 +/-    0.66  0.040 / 0.040
G18     56.7           22.0                9.4 +/-    0.76      19.6 +/-    0.76  0.050 / 0.110
G19     218.6          32.4               15.4 +/-    1.44      25.6 +/-    1.44  0.060 / 0.110
G28     4.1            60.9               12.5 +/-    0.40      14.1 +/-    0.40  0.030 / 0.050
G30     123.6          69.3               13.5 +/-    0.75      14.4 +/-    0.75  0.040 / 0.060