Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2021 1 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)
 01/11/2021   02:55:46   (  68.37, 134.59) 01/11/2021   02:56:16  (  68.39, 134.59)    2.87                30
 01/11/2021   03:46:28   ( -68.28, -57.98) 01/11/2021   03:45:46  ( -68.28, -57.91)    2.79                42
 01/13/2021   18:22:03   ( -68.78,  82.51) 01/13/2021   18:23:14  ( -68.67,  83.16)   29.01                71
 01/13/2021   19:12:41   (  68.34,-109.61) 01/13/2021   19:12:45  (  68.33,-109.60)    0.94                 4
 01/13/2021   20:03:22   ( -68.20,  57.90) 01/13/2021   20:02:15  ( -68.23,  57.90)    3.53                67
 01/16/2021   10:38:52   ( -68.43,-161.26) 01/16/2021   10:39:46  ( -68.44,-161.24)    1.52                54
 01/16/2021   11:29:35   (  68.27,   6.26) 01/16/2021   11:29:14  (  68.27,   6.20)    2.61                21
 01/16/2021   12:20:04   ( -67.47, 174.56) 01/16/2021   12:18:55  ( -67.55, 173.00)   67.11                69
 01/19/2021   02:05:22   (  69.47, 145.77) 01/19/2021   02:06:28  (  69.37, 148.18)   94.92                66
 01/19/2021   02:55:45   ( -68.35, -45.39) 01/19/2021   02:56:14  ( -68.38, -45.44)    3.27                29
 01/19/2021   03:46:29   (  68.24, 122.06) 01/19/2021   03:45:41  (  68.26, 122.06)    1.44                48
 01/21/2021   18:22:00   (  68.54, -97.19) 01/21/2021   18:23:11  (  68.51, -97.02)    7.22                71
 01/21/2021   19:12:40   ( -68.33,  70.41) 01/21/2021   19:12:43  ( -68.31,  70.36)    3.38                 3
 01/21/2021   20:03:23   (  68.17,-122.08) 01/21/2021   20:02:10  (  68.18,-122.15)    3.01                73