PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/21-03:12:50
G01     219.0          11.3                5.8 +/-    1.69      15.7 +/-    1.69  0.030 / 0.040
G03     266.7          70.1                4.2 +/-    0.43       4.4 +/-    0.43  0.030 / 0.060
G09     298.9          13.5                3.8 +/-    3.40       9.7 +/-    3.40  0.140 / 0.500
G14     91.8           21.6                2.5 +/-    1.22       5.4 +/-    1.22  0.190 / 0.400
G16     135.6          52.3                6.4 +/-    0.67       7.8 +/-    0.67  0.120 / 0.270
G22     206.9          64.1                5.4 +/-    0.48       5.9 +/-    0.48  0.130 / 0.300
G23     314.3          44.5                4.0 +/-    0.99       5.5 +/-    0.99  0.050 / 0.070
G26     81.9           53.7                4.7 +/-    0.36       5.7 +/-    0.36  0.070 / 0.070
G31     49.1           24.2                2.3 +/-    1.42       4.5 +/-    1.42  0.130 / 0.240