PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/06/21-15:42:40
G01     86.2           32.0               11.4 +/-    0.72      19.2 +/-    0.72  0.030 / 0.080
G07     128.2          38.5               11.4 +/-    1.07      17.0 +/-    1.07  0.030 / 0.080
G11     64.8           39.0                8.9 +/-    1.30      13.2 +/-    1.30  0.040 / 0.060
G13     290.6          37.8                9.7 +/-    0.88      14.6 +/-    0.88  0.040 / 0.050
G15     313.1          11.4                7.9 +/-    2.68      21.5 +/-    2.68  0.050 / 0.090
G17     215.7          54.3               13.9 +/-    1.05      16.7 +/-    1.05  0.040 / 0.100
G18     59.9           22.8                7.8 +/-    0.96      16.0 +/-    0.96  0.060 / 0.120
G19     215.0          30.5               13.7 +/-    1.21      23.8 +/-    1.21  0.070 / 0.120
G28     342.0          61.5                9.9 +/-    0.77      11.1 +/-    0.77  0.040 / 0.060
G30     115.6          71.4               10.2 +/-    0.29      10.7 +/-    0.29  0.050 / 0.060