Simultaneous Nadir Overpasses (SNOs) between NPP and METOP-C
TLE Epoch: 2020 12 18.  Predictions up to the next  14.0 days:

     Date     Time(NPP) NPP Lat/Lon Date Time(METOP-C) METOP-C Lat/Lon    Distance(km)  Time Diff(sec)
 12/31/2020   14:03:25   ( -73.41, 139.51) 12/31/2020   14:04:31  ( -73.34, 142.45)   93.71                66
 12/31/2020   14:54:07   (  73.23, -52.77) 12/31/2020   14:55:15  (  73.14, -50.65)   68.66                68
 12/31/2020   15:44:49   ( -73.11, 114.79) 12/31/2020   15:45:59  ( -73.02, 116.40)   53.32                70
 12/31/2020   16:35:31   (  72.93, -77.50) 12/31/2020   16:36:42  (  72.87, -76.58)   30.79                71
 12/31/2020   17:26:13   ( -72.82,  90.05) 12/31/2020   17:27:26  ( -72.74,  90.49)   16.55                73
 12/31/2020   18:16:56   (  72.68,-102.35) 12/31/2020   18:18:07  (  72.70,-102.28)    3.10                71
 12/31/2020   19:07:40   ( -72.67,  64.98) 12/31/2020   19:08:49  ( -72.67,  65.01)    0.84                69
 12/31/2020   19:58:26   (  72.68,-127.73) 12/31/2020   19:59:29  (  72.68,-127.66)    2.73                63
 12/31/2020   20:49:10   ( -72.67,  39.60) 12/31/2020   20:50:11  ( -72.65,  39.63)    2.45                61
 12/31/2020   21:39:55   (  72.64,-153.01) 12/31/2020   21:40:51  (  72.66,-153.04)    2.17                56
 12/31/2020   22:30:39   ( -72.63,  14.32) 12/31/2020   22:31:33  ( -72.63,  14.25)    2.57                54
 12/31/2020   23:21:25   (  72.64,-178.40) 12/31/2020   23:22:13  (  72.64,-178.42)    0.99                48
 01/01/2021   00:12:09   ( -72.63, -11.06) 01/01/2021   00:12:55  ( -72.61, -11.13)    3.15                46
 01/01/2021   01:02:55   (  72.65, 156.22) 01/01/2021   01:03:35  (  72.62, 156.20)    3.51                40
 01/01/2021   01:53:39   ( -72.64, -36.45) 01/01/2021   01:54:16  ( -72.65, -36.41)    1.46                37
 01/01/2021   02:44:25   (  72.65, 130.83) 01/01/2021   02:44:56  (  72.65, 130.92)    3.02                31