PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/25-20:27:40
G02     345.6          77.0               13.8 +/-    0.43      14.1 +/-    0.43  0.030 / 0.030
G05     164.9          36.8               17.4 +/-    0.93      26.7 +/-    0.93  0.030 / 0.030
G06     43.6           34.8               11.6 +/-    1.71      18.6 +/-    1.71  0.020 / 0.030
G12     294.4          77.7               15.3 +/-    0.86      15.6 +/-    0.86  0.030 / 0.020
G19     81.5           22.1               12.5 +/-    0.80      26.2 +/-    0.80  0.060 / 0.080
G24     225.7          19.4               19.1 +/-    3.52      42.6 +/-    3.52  0.050 / 0.070
G25     315.1          38.7               13.0 +/-    1.21      19.4 +/-    1.21  0.130 / 0.370
G29     290.9          13.3               14.4 +/-    1.13      37.4 +/-    1.13  0.180 / 0.200