PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/27-18:58:10
G01     67.7           32.5               12.1 +/-    1.15      20.1 +/-    1.15  0.080 / 0.330
G07     139.0          28.9               16.1 +/-    1.61      28.8 +/-    1.61  0.090 / 0.340
G11     52.3           29.4               11.4 +/-    1.17      20.2 +/-    1.17  0.070 / 0.140
G13     271.1          37.1               15.7 +/-    1.08      24.0 +/-    1.08  0.070 / 0.100
G15     300.9          15.4                9.8 +/-    2.45      24.2 +/-    2.45  0.030 / 0.050
G17     237.2          68.6               15.8 +/-    0.61      16.9 +/-    0.61  0.040 / 0.040
G18     47.2           17.0                9.1 +/-    1.29      21.6 +/-    1.29  0.030 / 0.050
G19     226.2          42.7               17.6 +/-    1.71      24.5 +/-    1.71  0.030 / 0.060
G28     24.6           58.6               12.1 +/-    0.36      13.9 +/-    0.36  0.030 / 0.050
G30     138.2          58.6               15.3 +/-    1.04      17.6 +/-    1.04  0.040 / 0.050