PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/23-01:12:40
G01     73.5           33.2                5.5 +/-    1.05       9.1 +/-    1.05  0.030 / 0.040
G07     136.1          33.3               10.1 +/-    1.42      16.6 +/-    1.42  0.030 / 0.050
G11     57.4           34.5                6.6 +/-    1.42      10.6 +/-    1.42  0.050 / 0.060
G13     278.2          37.4                8.9 +/-    1.44      13.5 +/-    1.44  0.050 / 0.060
G15     303.9          15.3                5.9 +/-    1.54      14.7 +/-    1.54  0.050 / 0.030
G17     229.4          65.1                9.2 +/-    0.93      10.0 +/-    0.93  0.030 / 0.030
G19     222.7          40.3                9.7 +/-    1.81      14.1 +/-    1.81  0.060 / 0.080
G28     16.8           59.6                6.7 +/-    1.30       7.6 +/-    1.30  0.050 / 0.070
G30     132.9          59.6                9.3 +/-    0.26      10.6 +/-    0.26  0.040 / 0.080