PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/17-19:27:50
G02     16.6           66.6                5.3 +/-    0.83       5.7 +/-    0.83  0.110 / 0.310
G05     154.7          49.7                7.6 +/-    0.60       9.6 +/-    0.60  0.190 / 0.210
G06     46.9           25.8                5.6 +/-    1.95      10.8 +/-    1.95  0.080 / 0.080
G12     248.7          79.4                5.1 +/-    0.25       5.2 +/-    0.25  0.060 / 0.080
G19     89.4           16.2                7.8 +/-    3.24      18.8 +/-    3.24  0.020 / 0.030
G24     217.3          11.7                8.0 +/-    2.91      21.5 +/-    2.91  0.030 / 0.020
G25     311.0          42.5                5.8 +/-    0.82       8.1 +/-    0.82  0.110 / 0.170
G29     297.9          19.5                6.5 +/-    2.00      14.4 +/-    2.00  0.090 / 0.180