PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/31-13:28:10
G01     125.5          12.7                4.6 +/-    5.29      12.2 +/-    5.29  0.090 / 0.090
G07     65.3           67.1                8.5 +/-    0.65       9.2 +/-    0.65  0.080 / 0.080
G08     48.6           36.4               -5.7 +/-   13.11      -8.7 +/-   13.11  0.030 / 0.020
G09     176.4          32.8                8.7 +/-    1.41      14.4 +/-    1.41  0.030 / 0.030
G11     113.3          34.9                7.3 +/-    4.11      11.7 +/-    4.11  0.040 / 0.030
G13     321.4          11.1               -3.8 +/-   17.65     -10.4 +/-   17.65  0.040 / 0.040
G17     199.4          18.8               18.5 +/-   16.63      42.0 +/-   16.63  0.130 / 0.280
G28     279.1          53.6              -63.1 +/-   54.99     -76.3 +/-   54.99  0.160 / 0.400
G30     332.1          59.7                6.5 +/-    0.69       7.4 +/-    0.69  0.260 / 0.370