PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/31-12:57:50
G01     116.2          19.9                6.5 +/-    1.33      14.3 +/-    1.33  0.030 / 0.030
G07     88.5           64.8                5.4 +/-    0.78       5.9 +/-    0.78  0.040 / 0.020
G08     43.5           27.6                4.3 +/-    1.95       7.9 +/-    1.95  0.030 / 0.030
G09     175.2          21.0                4.5 +/-    1.46       9.7 +/-    1.46  0.030 / 0.020
G11     101.3          41.0                4.6 +/-    0.69       6.6 +/-    0.69  0.130 / 0.180
G13     315.9          22.1                2.4 +/-    1.75       5.0 +/-    1.75  0.060 / 0.180
G17     202.2          28.4                5.4 +/-    2.26       9.8 +/-    2.26  0.130 / 0.170
G18     90.4           21.9                4.8 +/-    1.95      10.0 +/-    1.95  0.130 / 0.160
G28     298.4          58.5                3.9 +/-    0.80       4.5 +/-    0.80  0.110 / 0.130
G30     349.9          70.5                4.0 +/-    0.59       4.2 +/-    0.59  0.120 / 0.190