Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2020 12 21.  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)
 12/23/2020   10:38:50   (  68.46,  18.74) 12/23/2020   10:39:52  (  68.45,  18.80)    2.41                62
 12/23/2020   11:29:31   ( -68.32,-173.77) 12/23/2020   11:29:23  ( -68.29,-173.77)    3.62                 8
 12/23/2020   12:20:07   (  67.76,  -5.75) 12/23/2020   12:18:56  (  67.84,  -6.65)   38.58                71
 12/26/2020   02:55:44   (  68.36, 134.63) 12/26/2020   02:56:22  (  68.38, 134.58)    2.63                38
 12/26/2020   03:46:26   ( -68.28, -57.94) 12/26/2020   03:45:52  ( -68.27, -57.91)    1.40                34
 12/28/2020   18:22:05   ( -69.03,  82.20) 12/28/2020   18:23:15  ( -68.91,  83.47)   52.71                70
 12/28/2020   19:12:38   (  68.32,-109.55) 12/28/2020   19:12:50  (  68.35,-109.57)    3.11                12
 12/28/2020   20:03:20   ( -68.23,  57.88) 12/28/2020   20:02:20  ( -68.25,  57.94)    2.82                60
 12/31/2020   10:38:50   ( -68.46,-161.27) 12/31/2020   10:39:52  ( -68.44,-161.24)    2.66                62
 12/31/2020   11:29:33   (  68.29,   6.26) 12/31/2020   11:29:19  (  68.32,   6.27)    3.36                14
 12/31/2020   12:20:07   ( -67.76, 174.23) 12/31/2020   12:18:56  ( -67.83, 173.32)   38.90                71
 01/03/2021   02:55:45   ( -68.42, -45.46) 01/03/2021   02:56:21  ( -68.40, -45.40)    3.04                36
 01/03/2021   03:46:28   (  68.25, 122.07) 01/03/2021   03:45:48  (  68.28, 122.10)    3.09                40