PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/30-14:57:40
G07     10.5           66.5                9.2 +/-    0.72       9.9 +/-    0.72  0.080 / 0.140
G08     76.5           51.9               10.7 +/-    0.49      13.1 +/-    0.49  0.090 / 0.140
G09     183.2          60.3               13.0 +/-    1.39      14.8 +/-    1.39  0.030 / 0.050
G11     135.9          22.9               12.2 +/-    1.06      25.0 +/-    1.06  0.030 / 0.040
G23     158.3          26.3               12.0 +/-    0.88      22.8 +/-    0.88  0.030 / 0.040
G27     45.4           24.4                8.6 +/-    0.75      17.1 +/-    0.75  0.050 / 0.040
G28     246.8          34.9               12.2 +/-    1.05      19.3 +/-    1.05  0.070 / 0.120
G30     315.4          47.3                8.3 +/-    1.04      10.9 +/-    1.04  0.080 / 0.140