PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/31-15:12:40
G01     76.7           33.0               10.9 +/-    0.88      17.9 +/-    0.88  0.070 / 0.100
G07     134.1          32.3               13.4 +/-    1.85      22.3 +/-    1.85  0.070 / 0.100
G11     56.4           31.3               10.4 +/-    0.65      17.8 +/-    0.65  0.070 / 0.100
G13     283.4          36.9               10.7 +/-    0.97      16.4 +/-    0.97  0.070 / 0.100
G15     309.9          12.4                7.3 +/-    2.41      19.3 +/-    2.41  0.030 / 0.040
G17     225.9          67.1               11.3 +/-    1.16      12.2 +/-    1.16  0.030 / 0.040
G19     220.6          39.2               13.1 +/-    1.80      19.3 +/-    1.80  0.030 / 0.040
G28     10.3           60.2               10.8 +/-    0.81      12.3 +/-    0.81  0.030 / 0.050
G30     126.9          69.3               11.9 +/-    0.88      12.6 +/-    0.88  0.080 / 0.130