PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/25-15:57:40
G01     65.5           31.8               10.9 +/-    0.96      18.5 +/-    0.96  0.100 / 0.250
G06     181.2          10.8              -10.5 +/-   37.68     -28.7 +/-   37.68  0.080 / 0.200
G07     139.5          23.6               11.0 +/-    2.30      22.3 +/-    2.30  0.060 / 0.120
G11     49.9           24.7                9.0 +/-    1.80      17.7 +/-    1.80  0.060 / 0.140
G13     271.2          36.2               13.6 +/-    1.90      21.1 +/-    1.90  0.030 / 0.030
G15     302.1          14.6                7.2 +/-    2.93      18.1 +/-    2.93  0.030 / 0.030
G17     246.4          75.4               13.7 +/-    0.43      14.2 +/-    0.43  0.070 / 0.140
G19     228.0          48.2              -49.8 +/-   55.31     -64.3 +/-   55.31  0.090 / 0.120
G28     27.1           58.1                9.2 +/-    3.73      10.6 +/-    3.73  0.030 / 0.020
G30     139.0          60.1               12.3 +/-    0.41      13.9 +/-    0.41  0.030 / 0.020