PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/06/30-18:28:10
G02     211.3          52.3               13.8 +/-    1.75      17.0 +/-    1.75  0.090 / 0.080
G06     87.1           79.1               11.2 +/-    0.67      11.4 +/-    0.67  0.050 / 0.080
G12     315.0          28.0                7.8 +/-    1.33      14.2 +/-    1.33  0.040 / 0.080
G17     49.8           38.4                8.5 +/-    0.82      12.7 +/-    0.82  0.030 / 0.080
G19     31.9           52.9                9.9 +/-    0.70      12.1 +/-    0.70  0.070 / 0.160
G24     275.0          42.1               23.2 +/-    1.42      32.7 +/-    1.42  0.070 / 0.170
G28     115.7          23.8               10.4 +/-    1.30      20.8 +/-    1.30  0.090 / 0.240