PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/22-19:58:00
G01     81.3           32.7               11.7 +/-    0.80      19.5 +/-    0.80  0.040 / 0.060
G07     131.5          33.1               14.1 +/-    0.72      23.3 +/-    0.72  0.040 / 0.060
G11     59.9           36.0               10.8 +/-    0.76      16.8 +/-    0.76  0.040 / 0.080
G13     285.4          38.3               10.8 +/-    1.16      16.1 +/-    1.16  0.070 / 0.080
G15     309.5          13.2                9.2 +/-    1.21      23.9 +/-    1.21  0.030 / 0.040
G17     219.6          61.2               13.3 +/-    0.67      15.0 +/-    0.67  0.040 / 0.040
G18     54.9           20.8                9.6 +/-    1.00      20.8 +/-    1.00  0.090 / 0.110
G19     217.5          33.8               15.7 +/-    3.17      25.4 +/-    3.17  0.070 / 0.120
G28     353.1          61.6               10.4 +/-    1.14      11.7 +/-    1.14  0.080 / 0.300
G30     123.5          68.7               12.7 +/-    0.65      13.5 +/-    0.65  0.080 / 0.270