PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/15-14:12:50
G01     81.3           32.5                4.2 +/-    1.19       6.9 +/-    1.19  0.040 / 0.050
G07     131.0          35.9                7.5 +/-    0.52      11.7 +/-    0.52  0.060 / 0.050
G11     61.2           37.3                5.2 +/-    1.06       7.8 +/-    1.06  0.050 / 0.100
G13     285.8          38.5                6.2 +/-    2.25       9.2 +/-    2.25  0.040 / 0.090
G15     310.4          12.6                6.3 +/-    1.42      16.7 +/-    1.42  0.060 / 0.070
G17     219.1          56.9                9.5 +/-    1.04      11.1 +/-    1.04  0.040 / 0.090
G18     56.3           21.7                4.6 +/-    2.61       9.8 +/-    2.61  0.040 / 0.060
G19     216.9          34.4               10.5 +/-    1.28      16.8 +/-    1.28  0.060 / 0.060
G28     348.6          61.6                6.5 +/-    0.64       7.3 +/-    0.64  0.110 / 0.100
G30     122.5          69.5                8.0 +/-    0.65       8.5 +/-    0.65  0.090 / 0.100