PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/21-17:27:50
G01     124.0          14.2               11.9 +/-    2.81      30.3 +/-    2.81  0.040 / 0.050
G07     63.3           69.0               10.5 +/-    0.20      11.2 +/-    0.20  0.030 / 0.040
G08     48.8           38.5                9.5 +/-    0.49      14.1 +/-    0.49  0.040 / 0.070
G09     177.8          32.0               11.8 +/-    2.13      19.8 +/-    2.13  0.040 / 0.070
G11     115.1          37.2               11.2 +/-    0.74      17.1 +/-    0.74  0.050 / 0.040
G13     320.1          14.6                9.6 +/-    2.36      24.2 +/-    2.36  0.030 / 0.040
G17     201.4          16.1               13.1 +/-    2.61      31.7 +/-    2.61  0.060 / 0.120
G18     100.5          18.4               10.9 +/-    1.72      25.0 +/-    1.72  0.050 / 0.150
G28     282.8          55.0               12.1 +/-    1.31      14.4 +/-    1.31  0.040 / 0.060
G30     339.0          64.3               10.4 +/-    0.91      11.4 +/-    0.91  0.040 / 0.070