PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/15-10:42:50
G01     90.9           31.7                4.3 +/-    0.49       7.4 +/-    0.49  0.040 / 0.030
G07     125.1          45.3                5.9 +/-    1.36       7.9 +/-    1.36  0.030 / 0.030
G11     68.0           39.4                3.7 +/-    0.52       5.4 +/-    0.52  0.050 / 0.050
G13     294.9          36.1                3.8 +/-    1.11       5.8 +/-    1.11  0.050 / 0.060
G17     213.6          54.6                5.1 +/-    1.01       6.1 +/-    1.01  0.050 / 0.060
G18     63.1           23.4                3.5 +/-    0.63       7.1 +/-    0.63  0.050 / 0.060
G19     214.7          22.1                5.5 +/-    2.16      11.4 +/-    2.16  0.090 / 0.140
G28     346.0          61.8                2.9 +/-    0.76       3.2 +/-    0.76  0.070 / 0.100
G30     98.3           78.0                4.2 +/-    0.39       4.3 +/-    0.39  0.060 / 0.180