PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/23-23:27:30
G10     255.3          31.9               11.0 +/-    1.61      18.5 +/-    1.61  0.040 / 0.040
G13     48.6           25.6                8.6 +/-    1.60      16.5 +/-    1.60  0.050 / 0.040
G15     75.6           55.7                9.4 +/-    0.89      11.1 +/-    0.89  0.120 / 0.170
G16     291.1          15.1                5.6 +/-    2.80      14.0 +/-    2.80  0.200 / 0.160
G21     340.3          63.2                9.2 +/-    0.67      10.2 +/-    0.67  0.040 / 0.040
G26     263.6          13.3                8.3 +/-    1.75      21.6 +/-    1.75  0.040 / 0.040
G29     164.6          43.6               11.3 +/-    0.94      15.5 +/-    0.94  0.110 / 0.650