PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/21-17:43:00
G01     118.4          18.5               10.8 +/-    1.57      24.7 +/-    1.57  0.030 / 0.040
G07     81.9           66.5               11.3 +/-    0.45      12.2 +/-    0.45  0.020 / 0.040
G08     45.3           32.8                9.8 +/-    0.85      16.2 +/-    0.85  0.040 / 0.080
G09     176.9          25.2               11.5 +/-    2.05      22.4 +/-    2.05  0.040 / 0.070
G11     106.8          40.3               11.9 +/-    1.24      17.2 +/-    1.24  0.030 / 0.030
G13     317.4          19.9               11.5 +/-    4.19      25.4 +/-    4.19  0.030 / 0.040
G17     202.8          22.8               10.1 +/-    1.56      20.8 +/-    1.56  0.050 / 0.090
G18     93.8           21.2               11.1 +/-    0.83      23.7 +/-    0.83  0.050 / 0.080
G28     294.6          57.8               10.8 +/-    0.93      12.5 +/-    0.93  0.060 / 0.060
G30     349.9          69.8               11.4 +/-    0.94      12.0 +/-    0.94  0.050 / 0.060