PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/06/20-16:12:50
G01     71.6           32.6               10.3 +/-    0.61      17.1 +/-    0.61  0.070 / 0.160
G07     136.2          27.7               12.7 +/-    1.44      23.4 +/-    1.44  0.050 / 0.150
G11     54.0           31.8                8.0 +/-    0.96      13.5 +/-    0.96  0.040 / 0.060
G13     275.2          38.6               12.9 +/-    0.86      19.2 +/-    0.86  0.040 / 0.060
G15     303.2          15.2                8.7 +/-    3.59      21.5 +/-    3.59  0.060 / 0.120
G17     229.0          66.1               13.4 +/-    1.16      14.6 +/-    1.16  0.060 / 0.150
G18     49.0           18.2                7.5 +/-    0.89      17.3 +/-    0.89  0.070 / 0.080
G19     222.3          41.8               14.1 +/-    1.11      19.9 +/-    1.11  0.050 / 0.090
G28     5.7            61.1               10.6 +/-    0.61      11.9 +/-    0.61  0.040 / 0.020
G30     134.2          60.3               11.7 +/-    0.62      13.3 +/-    0.62  0.040 / 0.020