PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/15-19:57:40
G01     62.5           31.4               13.1 +/-    1.22      22.3 +/-    1.22  0.090 / 0.380
G07     141.3          24.7               16.1 +/-    0.56      31.7 +/-    0.56  0.100 / 0.350
G11     49.8           26.2               12.0 +/-    1.08      22.7 +/-    1.08  0.030 / 0.040
G13     265.5          35.9               16.8 +/-    1.70      26.2 +/-    1.70  0.030 / 0.050
G15     296.4          16.1               13.1 +/-    2.30      31.7 +/-    2.30  0.070 / 0.160
G17     246.9          71.7               16.4 +/-    0.52      17.1 +/-    0.52  0.070 / 0.160
G18     44.0           14.5                9.7 +/-    2.76      24.5 +/-    2.76  0.030 / 0.050
G19     230.3          47.2               17.2 +/-    2.04      22.5 +/-    2.04  0.040 / 0.060
G28     32.5           57.3               14.6 +/-    0.54      17.0 +/-    0.54  0.040 / 0.130
G30     141.9          53.6               16.1 +/-    0.96      19.4 +/-    0.96  0.060 / 0.140