PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/08-19:57:50
G01     78.1           33.3               16.2 +/-    0.67      26.5 +/-    0.67  0.080 / 0.150
G07     133.6          37.0               18.3 +/-    1.61      28.0 +/-    1.61  0.070 / 0.160
G11     59.3           35.5               13.7 +/-    0.66      21.6 +/-    0.66  0.030 / 0.050
G13     282.5          37.7               15.3 +/-    0.80      23.1 +/-    0.80  0.030 / 0.040
G15     308.0          13.6               10.5 +/-    1.76      27.0 +/-    1.76  0.060 / 0.100
G17     224.2          59.6               18.2 +/-    0.96      20.7 +/-    0.96  0.050 / 0.120
G18     54.5           21.2               12.0 +/-    1.58      25.6 +/-    1.58  0.060 / 0.120
G19     220.1          35.2               19.0 +/-    1.18      30.0 +/-    1.18  0.050 / 0.130
G28     9.2            60.5               12.8 +/-    0.61      14.5 +/-    0.61  0.030 / 0.060
G30     127.9          66.4               18.3 +/-    0.64      19.7 +/-    0.64  0.040 / 0.060