PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/19-19:12:50
G01     78.1           33.3               15.6 +/-    0.76      25.5 +/-    0.76  0.040 / 0.080
G07     133.6          36.9               17.1 +/-    1.76      26.1 +/-    1.76  0.040 / 0.080
G11     59.1           35.3               13.5 +/-    0.48      21.3 +/-    0.48  0.090 / 0.190
G13     282.4          37.7               15.2 +/-    1.04      23.0 +/-    1.04  0.080 / 0.200
G15     308.2          13.5               11.7 +/-    1.44      30.2 +/-    1.44  0.030 / 0.060
G17     224.2          60.3               17.8 +/-    1.41      20.2 +/-    1.41  0.030 / 0.060
G18     54.4           21.1               11.2 +/-    0.95      24.0 +/-    0.95  0.050 / 0.130
G19     220.1          34.9               15.7 +/-    1.02      25.0 +/-    1.02  0.050 / 0.110
G28     9.0            60.5               12.6 +/-    0.67      14.2 +/-    0.67  0.030 / 0.040
G30     127.9          66.8               16.5 +/-    0.53      17.8 +/-    0.53  0.030 / 0.040