PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/28-14:42:50
G01     99.6           28.7                8.7 +/-    1.28      15.7 +/-    1.28  0.030 / 0.030
G07     117.2          49.3               10.1 +/-    1.16      12.9 +/-    1.16  0.030 / 0.030
G08     41.7           12.8                6.5 +/-    1.56      17.1 +/-    1.56  0.030 / 0.060
G11     77.1           39.8                9.7 +/-    1.38      14.1 +/-    1.38  0.030 / 0.050
G13     305.4          31.0               11.5 +/-    2.60      19.7 +/-    2.60  0.040 / 0.070
G17     208.4          47.4               13.5 +/-    1.63      17.6 +/-    1.63  0.050 / 0.060
G19     210.9          20.8                9.9 +/-    1.56      21.3 +/-    1.56  0.060 / 0.150
G28     331.8          61.5                8.9 +/-    0.58      10.0 +/-    0.58  0.070 / 0.120
G30     45.6           80.0                9.5 +/-    0.63       9.6 +/-    0.63  0.070 / 0.170