PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/03/31-06:43:10
G02     85.2           11.3                4.4 +/-    3.10      11.9 +/-    3.10  0.090 / 0.090
G05     45.0           30.1                3.2 +/-    1.37       5.5 +/-    1.37  0.060 / 0.090
G13     98.4           33.7                6.1 +/-    1.03      10.0 +/-    1.03  0.040 / 0.040
G15     142.7          39.3                6.7 +/-    0.61       9.8 +/-    0.61  0.060 / 0.040
G20     249.3          70.9                5.6 +/-    0.45       5.9 +/-    0.45  0.080 / 0.170
G21     298.0          36.8                4.4 +/-    2.60       6.7 +/-    2.60  0.090 / 0.150
G25     209.4          25.5                5.8 +/-    1.25      11.2 +/-    1.25  0.030 / 0.020
G26     303.9          19.1                3.0 +/-    2.14       6.7 +/-    2.14  0.030 / 0.030
G29     31.4           86.7                4.4 +/-    0.61       4.4 +/-    0.61  0.120 / 0.150