Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2021 12 9.  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)
 12/10/2021   05:36:22   (  69.16,  93.70) 12/10/2021   05:37:32  (  69.15,  93.72)    1.31                70
 12/10/2021   06:27:03   ( -69.04, -98.80) 12/10/2021   06:27:02  ( -69.04, -98.80)    0.21                 1
 12/10/2021   07:17:44   (  68.75,  68.90) 12/10/2021   07:16:31  (  68.82,  68.57)   15.60                73
 12/12/2021   21:53:13   (  69.11,-150.43) 12/12/2021   21:53:57  (  69.13,-150.44)    2.36                44
 12/12/2021   22:43:55   ( -69.03,  16.99) 12/12/2021   22:43:27  ( -69.01,  17.05)    3.08                28
 12/15/2021   13:19:35   ( -69.97, 156.79) 12/15/2021   13:20:43  ( -69.87, 158.79)   77.23                68
 12/15/2021   14:10:05   (  69.10, -34.65) 12/15/2021   14:10:22  (  69.09, -34.59)    2.50                17
 12/15/2021   15:00:46   ( -68.97, 132.85) 12/15/2021   14:59:52  ( -68.98, 132.90)    2.46                54
 12/18/2021   05:36:11   ( -69.17, -86.27) 12/18/2021   05:37:19  ( -69.17, -86.25)    0.80                68
 12/18/2021   06:26:55   (  69.05,  81.20) 12/18/2021   06:26:46  (  69.06,  81.24)    1.69                 9
 12/18/2021   07:17:32   ( -68.70,-111.01) 12/18/2021   07:16:19  ( -68.78,-111.47)   20.70                73
 12/20/2021   21:53:02   ( -69.12,  29.58) 12/20/2021   21:53:44  ( -69.13,  29.58)    1.36                42
 12/20/2021   22:43:46   (  69.00,-162.95) 12/20/2021   22:43:11  (  69.01,-162.93)    1.36                35