Simultaneous Nadir Overpasses (SNOs) between NOAA-20 and NOAA-19
TLE Epoch: 2017 12 20.  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   22:25:08   ( -80.70, -23.55) 12/21/2017   22:23:59  ( -80.71, -23.45)    2.45                69
 12/21/2017   23:15:51   (  80.70, 143.68) 12/21/2017   23:15:01  (  80.71, 143.67)    0.65                50
 12/22/2017   00:06:35   ( -80.72, -49.32) 12/22/2017   00:06:01  ( -80.71, -49.18)    3.21                34
 12/22/2017   00:57:17   (  80.71, 118.26) 12/22/2017   00:57:02  (  80.71, 118.29)    0.92                15
 12/22/2017   01:48:00   ( -80.71, -74.40) 12/22/2017   01:48:02  ( -80.71, -74.55)    2.75                 2
 12/22/2017   02:38:43   (  80.71,  92.83) 12/22/2017   02:39:03  (  80.72,  92.92)    1.66                20
 12/22/2017   03:29:26   ( -80.71, -99.83) 12/22/2017   03:30:03  ( -80.71, -99.92)    1.83                37
 12/22/2017   04:20:09   (  80.72,  67.41) 12/22/2017   04:21:04  (  80.72,  67.54)    2.48                55
 12/22/2017   05:10:52   ( -80.72,-125.25) 12/22/2017   05:12:04  ( -80.72,-125.30)    0.96                72
 01/03/2018   01:11:00   ( -80.69, -64.81) 01/03/2018   01:09:47  ( -80.70, -64.83)    1.95                73
 01/03/2018   02:01:43   (  80.70, 102.31) 01/03/2018   02:00:46  (  80.69, 102.17)    2.71                57
 01/03/2018   02:52:27   ( -80.71, -90.58) 01/03/2018   02:51:49  ( -80.69, -90.57)    1.83                38
 01/03/2018   03:43:09   (  80.70,  76.89) 01/03/2018   03:42:47  (  80.70,  76.78)    1.96                22
 01/03/2018   04:33:53   ( -80.71,-116.00) 01/03/2018   04:33:50  ( -80.70,-115.94)    2.06                 3
 01/03/2018   05:24:35   (  80.71,  51.47) 01/03/2018   05:24:48  (  80.70,  51.40)    1.22                13