PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/28-18:57:40
G01     125.5          13.0               15.5 +/-    2.91      40.3 +/-    2.91  0.040 / 0.050
G07     57.6           69.5               12.5 +/-    0.62      13.2 +/-    0.62  0.050 / 0.060
G08     50.7           41.1               12.5 +/-    0.99      17.9 +/-    0.99  0.050 / 0.070
G09     178.4          34.4               14.2 +/-    1.62      22.8 +/-    1.62  0.050 / 0.050
G11     117.8          36.1               16.2 +/-    0.69      25.2 +/-    0.69  0.110 / 0.400
G13     320.7          13.0               11.3 +/-    3.84      29.5 +/-    3.84  0.170 / 0.380
G17     201.6          13.3               16.2 +/-    2.57      41.9 +/-    2.57  0.030 / 0.040
G18     102.4          17.5               15.2 +/-    1.35      35.5 +/-    1.35  0.040 / 0.040
G28     280.0          54.2               15.3 +/-    0.84      18.4 +/-    0.84  0.080 / 0.120
G30     337.8          63.4               11.5 +/-    0.66      12.7 +/-    0.66  0.070 / 0.110