PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/10/18-06:57:50
G01     104.5          25.3                4.0 +/-    1.44       7.7 +/-    1.44  0.040 / 0.030
G07     108.0          56.9                5.1 +/-    0.61       5.9 +/-    0.61  0.030 / 0.030
G08     41.9           20.8                2.2 +/-    2.80       4.8 +/-    2.80  0.260 / 0.220
G09     173.3          11.9                4.3 +/-    5.63      11.4 +/-    5.63  0.160 / 0.180
G11     90.8           44.8                5.6 +/-    0.97       7.6 +/-    0.97  0.300 / 0.690
G13     308.5          30.3                4.2 +/-    1.31       7.3 +/-    1.31  0.290 / 0.540
G17     205.2          37.3                5.0 +/-    1.36       7.5 +/-    1.36  0.030 / 0.040
G19     208.0          15.5                3.1 +/-    6.18       7.6 +/-    6.18  0.030 / 0.040
G28     304.1          57.6                3.5 +/-    1.26       4.1 +/-    1.26  0.060 / 0.070
G30     11.3           77.8                4.2 +/-    1.13       4.3 +/-    1.13  0.040 / 0.070