Simultaneous Nadir Overpasses (SNOs) between NOAA-19 and NPP
TLE Epoch: 2021 4 10.  Predictions up to the next  14.0 days:

     Date     Time(NOAA-19) NOAA-19 Lat/Lon Date Time(NPP) NPP Lat/Lon    Distance(km)  Time Diff(sec)
 04/10/2021   23:47:28   (  78.44, 155.62) 04/10/2021   23:48:41  (  78.43, 155.69)    1.94                73
 04/11/2021   00:38:32   ( -78.46, -37.02) 04/11/2021   00:39:26  ( -78.46, -37.16)    3.26                54
 04/11/2021   01:29:28   (  78.46, 130.22) 04/11/2021   01:30:11  (  78.44, 130.29)    2.68                43
 04/11/2021   02:20:32   ( -78.48, -62.42) 04/11/2021   02:20:56  ( -78.47, -62.57)    3.38                24
 04/11/2021   03:11:28   (  78.47, 104.81) 04/11/2021   03:11:41  (  78.44, 104.88)    3.56                13
 04/11/2021   04:02:33   ( -78.46, -88.07) 04/11/2021   04:02:26  ( -78.47, -87.97)    2.83                 7
 04/11/2021   04:53:28   (  78.49,  79.41) 04/11/2021   04:53:12  (  78.49,  79.25)    3.52                16
 04/11/2021   05:44:33   ( -78.47,-113.47) 04/11/2021   05:43:56  ( -78.48,-113.37)    2.36                37
 04/11/2021   06:35:29   (  78.47,  53.77) 04/11/2021   06:34:42  (  78.49,  53.85)    3.44                47
 04/11/2021   07:26:33   ( -78.48,-138.88) 04/11/2021   07:25:26  ( -78.48,-138.78)    2.25                67
 04/11/2021   08:17:27   (  78.55,  28.84) 04/11/2021   08:16:13  (  78.54,  28.22)   13.99                74