PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/31-14:13:10
G03     188.8          16.5                8.4 +/-    1.15      20.2 +/-    1.15  0.060 / 0.120
G07     294.6          39.7                9.3 +/-    1.30      13.5 +/-    1.30  0.070 / 0.120
G08     139.9          31.3               11.1 +/-    0.98      19.0 +/-    0.98  0.050 / 0.080
G09     319.1          68.0                6.4 +/-    0.72       6.9 +/-    0.72  0.050 / 0.080
G16     41.9           32.6                8.1 +/-    1.03      13.4 +/-    1.03  0.140 / 0.350
G23     129.7          71.2               11.2 +/-    0.90      11.8 +/-    0.90  0.130 / 0.430
G27     93.6           35.5                9.3 +/-    0.72      14.6 +/-    0.72  0.040 / 0.050
G30     277.4          15.6               10.9 +/-    1.76      26.8 +/-    1.76  0.030 / 0.050