PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/22-18:12:30
G02     216.4          58.3               12.3 +/-    0.88      14.2 +/-    0.88  0.070 / 0.070
G06     55.8           72.5               11.7 +/-    0.31      12.2 +/-    0.31  0.080 / 0.080
G12     319.6          39.5                8.6 +/-    1.28      12.6 +/-    1.28  0.050 / 0.070
G17     57.5           32.2                7.5 +/-    2.09      12.6 +/-    2.09  0.050 / 0.060
G19     35.8           51.5               10.4 +/-    1.26      12.9 +/-    1.26  0.040 / 0.030
G24     263.6          41.8               12.9 +/-    2.16      18.2 +/-    2.16  0.040 / 0.030
G28     122.6          13.8               10.5 +/-    2.01      27.0 +/-    2.01  0.040 / 0.040