Simultaneous Nadir Overpasses (SNOs) between NOAA-20 and NOAA-19
TLE Epoch: 2017 12 11.  Predictions up to the next  14.0 days:

     Date     Time(NOAA-20) NOAA-20 Lat/Lon Date Time(NOAA-19) NOAA-19 Lat/Lon    Distance(km)  Time Diff(sec)
 12/21/2017   02:51:57   (  80.72,  89.48) 12/21/2017   02:50:46  (  80.71,  89.60)    2.43                71
 12/21/2017   03:42:37   ( -80.71,-103.00) 12/21/2017   03:41:45  ( -80.71,-102.93)    1.56                52
 12/21/2017   04:33:17   (  80.71,  64.24) 12/21/2017   04:32:47  (  80.71,  64.22)    0.33                30
 12/21/2017   05:23:58   ( -80.72,-128.58) 12/21/2017   05:23:47  ( -80.71,-128.66)    2.10                11
 12/21/2017   06:14:37   (  80.71,  39.00) 12/21/2017   06:14:48  (  80.72,  38.84)    3.02                11
 12/21/2017   07:05:18   ( -80.71,-153.82) 12/21/2017   07:05:47  ( -80.72,-153.67)    2.78                29
 12/21/2017   07:55:58   (  80.72,  13.42) 12/21/2017   07:56:49  (  80.72,  13.47)    0.93                51