Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2020 12 28.  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)
 12/28/2020   18:22:05   ( -69.02,  82.21) 12/28/2020   18:23:15  ( -68.92,  83.48)   51.99                70
 12/28/2020   19:12:39   (  68.36,-109.60) 12/28/2020   19:12:50  (  68.37,-109.56)    2.09                11
 12/28/2020   20:03:20   ( -68.22,  57.89) 12/28/2020   20:02:21  ( -68.20,  57.88)    2.66                59
 12/31/2020   10:38:50   ( -68.44,-161.25) 12/31/2020   10:39:52  ( -68.44,-161.23)    0.94                62
 12/31/2020   11:29:34   (  68.32,   6.22) 12/31/2020   11:29:19  (  68.33,   6.28)    3.07                15
 12/31/2020   12:20:07   ( -67.75, 174.25) 12/31/2020   12:18:56  ( -67.83, 173.33)   39.76                71
 01/03/2021   02:55:45   ( -68.40, -45.43) 01/03/2021   02:56:21  ( -68.41, -45.40)    1.63                36
 01/03/2021   03:46:27   (  68.23, 122.10) 01/03/2021   03:45:48  (  68.24, 122.05)    2.31                39
 01/05/2021   18:22:04   (  68.83, -97.56) 01/05/2021   18:23:15  (  68.69, -96.80)   34.38                71
 01/05/2021   19:12:39   ( -68.36,  70.38) 01/05/2021   19:12:49  ( -68.36,  70.43)    2.05                10
 01/05/2021   20:03:22   (  68.19,-122.09) 01/05/2021   20:02:17  (  68.19,-122.13)    1.64                65
 01/08/2021   10:38:52   (  68.43,  18.75) 01/08/2021   10:39:48  (  68.42,  18.74)    1.26                56
 01/08/2021   11:29:34   ( -68.33,-173.80) 01/08/2021   11:29:18  ( -68.32,-173.75)    2.70                16
 01/08/2021   12:20:05   (  67.51,  -5.48) 01/08/2021   12:18:56  (  67.58,  -6.96)   63.02                69
 01/11/2021   02:55:47   (  68.40, 134.56) 01/11/2021   02:56:16  (  68.42, 134.62)    3.32                29