PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/21-16:57:50
G02     210.2          49.2               10.2 +/-    1.00      13.0 +/-    1.00  0.040 / 0.070
G06     98.0           79.2                9.5 +/-    0.34       9.6 +/-    0.34  0.040 / 0.080
G12     314.2          26.6                6.9 +/-    1.51      13.1 +/-    1.51  0.090 / 0.080
G17     47.1           40.8                7.1 +/-    1.46      10.2 +/-    1.46  0.080 / 0.080
G19     29.2           54.2                8.3 +/-    1.28      10.0 +/-    1.28  0.070 / 0.210
G24     278.6          41.9                7.3 +/-    1.27      10.3 +/-    1.27  0.070 / 0.180
G28     113.7          25.8                8.0 +/-    0.89      15.3 +/-    0.89  0.040 / 0.030