PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/12-12:43:00
G01     62.9           31.2                3.9 +/-    0.67       6.7 +/-    0.67  0.020 / 0.030
G06     181.4          12.1                5.3 +/-    4.98      14.2 +/-    4.98  0.030 / 0.030
G11     49.0           23.7                3.0 +/-    0.89       6.0 +/-    0.89  0.030 / 0.040
G13     268.5          35.6                6.5 +/-    1.23      10.3 +/-    1.23  0.040 / 0.040
G15     298.0          15.8                3.3 +/-    2.10       8.1 +/-    2.10  0.120 / 0.300
G17     255.1          77.1                4.7 +/-    0.45       4.9 +/-    0.45  0.100 / 0.310
G19     230.4          50.3                8.1 +/-    0.89      10.2 +/-    0.89  0.050 / 0.080
G28     31.9           57.3                3.1 +/-    0.70       3.6 +/-    0.70  0.050 / 0.070
G30     141.2          56.7                3.4 +/-    0.94       4.0 +/-    0.94  0.130 / 0.310