PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/30-15:58:00
G07     356.7          65.0               13.2 +/-    0.68      14.4 +/-    0.68  0.040 / 0.040
G08     76.8           52.5               12.6 +/-    1.01      15.4 +/-    1.01  0.040 / 0.040
G09     181.3          58.0               14.5 +/-    0.66      16.8 +/-    0.66  0.030 / 0.040
G11     136.8          22.2               12.1 +/-    1.29      25.3 +/-    1.29  0.030 / 0.030
G23     157.8          23.7               12.7 +/-    1.47      25.5 +/-    1.47  0.070 / 0.060
G27     44.2           22.7               10.3 +/-    2.59      21.2 +/-    2.59  0.070 / 0.050
G28     250.3          40.3               15.6 +/-    1.62      22.5 +/-    1.62  0.170 / 0.150
G30     313.8          45.2               13.1 +/-    0.71      17.6 +/-    0.71  0.090 / 0.140