PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/30-19:42:50
G01     103.7          27.3               10.2 +/-    1.27      18.9 +/-    1.27  0.170 / 0.140
G07     111.5          56.2               10.8 +/-    0.40      12.7 +/-    0.40  0.270 / 0.220
G08     42.1           20.5                8.2 +/-    2.14      17.8 +/-    2.14  0.070 / 0.130
G09     174.5          11.1               14.9 +/-    3.41      40.5 +/-    3.41  0.060 / 0.130
G11     86.1           43.2               11.4 +/-    1.11      15.7 +/-    1.11  0.070 / 0.100
G13     307.1          30.4               10.1 +/-    0.80      17.5 +/-    0.80  0.080 / 0.140
G17     208.4          37.3               12.6 +/-    1.43      19.2 +/-    1.43  0.030 / 0.040
G18     77.3           24.7                9.8 +/-    1.23      19.2 +/-    1.23  0.020 / 0.040
G28     325.3          61.5                9.2 +/-    0.73      10.4 +/-    0.73  0.030 / 0.020
G30     48.7           79.1               10.7 +/-    0.42      10.8 +/-    0.42  0.030 / 0.020