PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/06/20-15:12:50
G01     103.9          26.3                9.1 +/-    1.06      17.2 +/-    1.06  0.060 / 0.060
G07     112.6          51.8               10.0 +/-    0.80      12.3 +/-    0.80  0.040 / 0.060
G08     41.8           19.8                8.3 +/-    2.37      18.3 +/-    2.37  0.040 / 0.070
G09     175.1          12.9                9.1 +/-    1.32      23.7 +/-    1.32  0.080 / 0.080
G11     84.9           43.4               10.6 +/-    0.59      14.6 +/-    0.59  0.030 / 0.040
G13     307.2          31.0                8.8 +/-    1.08      15.2 +/-    1.08  0.030 / 0.050
G17     206.4          38.3               10.6 +/-    1.10      15.8 +/-    1.10  0.080 / 0.150
G18     76.5           24.2                9.6 +/-    0.99      19.2 +/-    0.99  0.070 / 0.130
G28     311.2          59.2                9.2 +/-    1.19      10.5 +/-    1.19  0.080 / 0.080
G30     50.1           78.9                9.7 +/-    1.03       9.9 +/-    1.03  0.050 / 0.070