PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/13-15:58:10
G07     3.1            65.4               12.4 +/-    0.40      13.5 +/-    0.40  0.060 / 0.160
G08     82.4           52.3               12.7 +/-    1.42      15.5 +/-    1.42  0.070 / 0.140
G09     185.1          64.7               13.4 +/-    0.36      14.7 +/-    0.36  0.030 / 0.040
G11     138.5          20.3               15.1 +/-    2.18      32.9 +/-    2.18  0.040 / 0.050
G23     157.8          31.0               13.1 +/-    0.94      22.5 +/-    0.94  0.130 / 0.290
G27     48.2           27.2                8.2 +/-    1.96      15.3 +/-    1.96  0.150 / 0.300
G28     243.4          32.3               14.0 +/-    2.11      23.3 +/-    2.11  0.080 / 0.160
G30     311.3          43.9               11.3 +/-    1.40      15.5 +/-    1.40  0.120 / 0.140