Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2021 2 4.  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)
 02/06/2021   18:21:59   (  68.46, -97.10) 02/06/2021   18:23:02  (  68.46, -97.09)    0.21                63
 02/06/2021   19:12:40   ( -68.32,  70.41) 02/06/2021   19:12:33  ( -68.30,  70.34)    3.27                 7
 02/06/2021   20:03:17   (  67.82,-121.66) 02/06/2021   20:02:06  (  67.85,-122.54)   37.11                71
 02/09/2021   10:38:53   (  68.41,  18.75) 02/09/2021   10:39:30  (  68.41,  18.72)    0.99                37
 02/09/2021   11:29:35   ( -68.31,-173.81) 02/09/2021   11:29:00  ( -68.30,-173.77)    2.02                35
 02/12/2021   02:05:12   ( -69.00, -33.58) 02/12/2021   02:06:22  ( -68.91, -32.41)   47.65                70
 02/12/2021   02:55:46   (  68.35, 134.59) 02/12/2021   02:55:57  (  68.35, 134.54)    2.10                11
 02/12/2021   03:46:28   ( -68.26, -57.97) 02/12/2021   03:45:27  ( -68.25, -57.95)    1.14                61
 02/14/2021   18:21:57   ( -68.47,  82.90) 02/14/2021   18:22:57  ( -68.47,  82.91)    0.52                60
 02/14/2021   19:12:41   (  68.36,-109.65) 02/14/2021   19:12:24  (  68.34,-109.59)    2.81                17
 02/14/2021   20:03:13   ( -67.72,  58.47) 02/14/2021   20:02:02  ( -67.80,  57.40)   45.63                71
 02/17/2021   10:38:51   ( -68.42,-161.27) 02/17/2021   10:39:25  ( -68.40,-161.28)    1.99                34
 02/17/2021   11:29:34   (  68.26,   6.25) 02/17/2021   11:28:52  (  68.27,   6.21)    2.72                42