Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2021 1 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)
 01/05/2021   18:22:04   (  68.83, -97.55) 01/05/2021   18:23:15  (  68.70, -96.80)   33.90                71
 01/05/2021   19:12:39   ( -68.37,  70.38) 01/05/2021   19:12:49  ( -68.36,  70.43)    2.19                10
 01/05/2021   20:03:22   (  68.19,-122.09) 01/05/2021   20:02:17  (  68.20,-122.13)    1.68                65
 01/08/2021   10:38:52   (  68.43,  18.75) 01/08/2021   10:39:48  (  68.42,  18.74)    0.52                56
 01/08/2021   11:29:34   ( -68.33,-173.81) 01/08/2021   11:29:18  ( -68.31,-173.75)    3.40                16
 01/08/2021   12:20:05   (  67.51,  -5.48) 01/08/2021   12:18:56  (  67.58,  -6.95)   62.99                69
 01/11/2021   02:55:46   (  68.35, 134.62) 01/11/2021   02:56:17  (  68.37, 134.56)    3.58                31
 01/11/2021   03:46:28   ( -68.25, -57.94) 01/11/2021   03:45:47  ( -68.26, -57.93)    1.31                41
 01/13/2021   18:22:02   ( -68.75,  82.54) 01/13/2021   18:23:14  ( -68.65,  83.13)   26.57                72
 01/13/2021   19:12:40   (  68.32,-109.58) 01/13/2021   19:12:45  (  68.31,-109.64)    2.93                 5
 01/13/2021   20:03:22   ( -68.22,  57.86) 01/13/2021   20:02:15  ( -68.21,  57.88)    2.08                67
 01/16/2021   10:38:51   ( -68.41,-161.23) 01/16/2021   10:39:46  ( -68.42,-161.27)    1.76                55
 01/16/2021   11:29:35   (  68.30,   6.21) 01/16/2021   11:29:13  (  68.30,   6.23)    0.93                22
 01/16/2021   12:20:04   ( -67.50, 174.53) 01/16/2021   12:18:55  ( -67.53, 172.98)   66.01                69