PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/23-10:58:00
G01     64.4           31.8                3.2 +/-    0.83       5.4 +/-    0.83  0.050 / 0.050
G07     140.3          25.1                6.0 +/-    1.69      11.6 +/-    1.69  0.040 / 0.040
G11     49.5           25.7                3.8 +/-    0.81       7.3 +/-    0.81  0.060 / 0.150
G13     266.9          36.7                5.7 +/-    1.51       8.8 +/-    1.51  0.050 / 0.140
G15     302.0          13.8               -0.3 +/-    2.71      -0.7 +/-    2.71  0.060 / 0.080
G17     248.6          75.5                6.5 +/-    0.80       6.7 +/-    0.80  0.050 / 0.080
G18     43.9           14.2                0.3 +/-    1.72       0.7 +/-    1.72  0.080 / 0.110
G19     228.1          42.6                8.1 +/-    1.03      11.3 +/-    1.03  0.080 / 0.120
G28     27.5           58.3                3.3 +/-    0.38       3.8 +/-    0.38  0.110 / 0.280
G30     141.1          58.0                5.7 +/-    1.06       6.6 +/-    1.06  0.090 / 0.220