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               10.4 +/-    0.75      17.1 +/-    0.75  0.230 / 0.240
G07     131.8          39.2               13.6 +/-    0.76      20.0 +/-    0.76  0.190 / 0.260
G11     61.3           36.7               12.0 +/-    1.04      18.4 +/-    1.04  0.040 / 0.070
G13     285.6          37.5               14.6 +/-    0.61      22.1 +/-    0.61  0.040 / 0.070
G15     310.4          12.5               11.9 +/-    1.79      31.3 +/-    1.79  0.030 / 0.030
G17     221.5          58.2               15.4 +/-    1.81      17.8 +/-    1.81  0.030 / 0.040
G18     56.7           22.0                9.6 +/-    2.82      20.1 +/-    2.82  0.060 / 0.120
G19     218.6          32.4               14.2 +/-    1.73      23.6 +/-    1.73  0.080 / 0.110
G28     4.1            60.9               12.1 +/-    1.01      13.6 +/-    1.01  0.150 / 0.310
G30     123.6          69.3               13.9 +/-    0.45      14.8 +/-    0.45  0.110 / 0.220