Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2021 12 11.  Predictions up to the next  14.0 days:

     Date     Time(NPP) NPP Lat/Lon Date Time(TERRA) TERRA Lat/Lon    Distance(km)  Time Diff(sec)
 12/12/2021   21:53:13   (  69.13,-150.46) 12/12/2021   21:53:57  (  69.10,-150.47)    2.69                44
 12/12/2021   22:43:54   ( -69.00,  17.03) 12/12/2021   22:43:27  ( -68.99,  17.02)    1.55                27
 12/15/2021   13:19:35   ( -69.99, 156.76) 12/15/2021   13:20:42  ( -69.90, 158.83)   79.90                67
 12/15/2021   14:10:04   (  69.07, -34.61) 12/15/2021   14:10:22  (  69.07, -34.62)    0.68                18
 12/15/2021   15:00:45   ( -68.94, 132.89) 12/15/2021   14:59:52  ( -68.96, 132.87)    2.15                53
 12/18/2021   05:36:11   ( -69.14, -86.23) 12/18/2021   05:37:20  ( -69.15, -86.29)    2.30                69
 12/18/2021   06:26:55   (  69.02,  81.25) 12/18/2021   06:26:47  (  69.03,  81.21)    2.16                 8
 12/18/2021   07:17:33   ( -68.72,-111.04) 12/18/2021   07:16:20  ( -68.76,-111.50)   19.05                73
 12/20/2021   21:53:03   ( -69.14,  29.55) 12/20/2021   21:53:45  ( -69.11,  29.55)    3.68                42
 12/20/2021   22:43:46   (  68.97,-162.91) 12/20/2021   22:43:12  (  68.99,-162.96)    3.22                34
 12/23/2021   13:19:21   (  69.71, -22.81) 12/23/2021   13:20:31  (  69.61, -21.54)   50.10                70
 12/23/2021   14:09:53   ( -69.09, 145.40) 12/23/2021   14:10:09  ( -69.06, 145.37)    3.28                16
 12/23/2021   15:00:36   (  68.92, -47.06) 12/23/2021   14:59:36  (  68.94, -47.14)    3.70                60