PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/13-19:43:10
G01     74.4           33.3               12.5 +/-    0.54      20.6 +/-    0.54  0.100 / 0.240
G07     135.6          34.2               15.0 +/-    1.11      24.2 +/-    1.11  0.080 / 0.210
G11     56.6           33.6               10.5 +/-    0.74      17.1 +/-    0.74  0.030 / 0.050
G13     278.6          37.7               13.6 +/-    0.91      20.6 +/-    0.91  0.030 / 0.040
G15     305.5          14.4               10.1 +/-    2.85      25.4 +/-    2.85  0.030 / 0.060
G17     227.9          62.8               15.1 +/-    0.99      16.7 +/-    0.99  0.030 / 0.060
G18     51.8           19.9                9.8 +/-    0.73      21.7 +/-    0.73  0.050 / 0.130
G19     222.1          37.8               16.2 +/-    2.49      24.4 +/-    2.49  0.050 / 0.140
G28     14.6           59.9               11.9 +/-    0.49      13.6 +/-    0.49  0.050 / 0.080
G30     132.0          63.7               14.9 +/-    0.69      16.4 +/-    0.69  0.030 / 0.080