PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/22-19:43:00
G01     117.9          18.9               15.0 +/-    2.02      34.0 +/-    2.02  0.130 / 0.240
G07     83.3           66.2               13.2 +/-    0.56      14.2 +/-    0.56  0.100 / 0.210
G08     45.5           33.7               10.0 +/-    0.87      16.3 +/-    0.87  0.030 / 0.060
G09     177.2          25.1               14.2 +/-    1.37      27.7 +/-    1.37  0.040 / 0.060
G11     107.0          40.5               13.6 +/-    0.57      19.7 +/-    0.57  0.110 / 0.180
G13     317.2          20.2                9.5 +/-    1.98      20.9 +/-    1.98  0.120 / 0.210
G17     203.4          21.9               13.6 +/-    1.42      28.6 +/-    1.42  0.040 / 0.030
G18     93.3           21.4               13.0 +/-    1.37      27.8 +/-    1.37  0.030 / 0.030
G28     296.1          58.1               12.1 +/-    1.06      14.0 +/-    1.06  0.030 / 0.040
G30     353.7          70.9               12.6 +/-    0.51      13.3 +/-    0.51  0.030 / 0.030