PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/30-22:58:10
G02     203.0          36.1               16.2 +/-    1.03      25.3 +/-    1.03  0.200 / 0.420
G06     157.8          69.9               13.3 +/-    0.98      14.0 +/-    0.98  0.130 / 0.350
G12     307.9          15.7               10.4 +/-    2.34      25.5 +/-    2.34  0.060 / 0.100
G17     32.4           52.2               10.4 +/-    0.84      12.8 +/-    0.84  0.060 / 0.090
G19     359.7          65.4               10.5 +/-    0.55      11.4 +/-    0.55  0.080 / 0.150
G24     297.4          38.3               12.5 +/-    1.78      18.7 +/-    1.78  0.080 / 0.120
G28     103.2          30.6               13.0 +/-    0.55      22.6 +/-    0.55  0.070 / 0.080