Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2021 1 10.  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   (  68.38, 134.58) 01/11/2021   02:56:16  (  68.39, 134.58)    1.15                30
 01/11/2021   03:46:28   ( -68.29, -57.99) 01/11/2021   03:45:46  ( -68.28, -57.92)    3.17                42
 01/13/2021   18:22:03   ( -68.79,  82.50) 01/13/2021   18:23:14  ( -68.66,  83.15)   29.96                71
 01/13/2021   19:12:41   (  68.35,-109.62) 01/13/2021   19:12:45  (  68.33,-109.61)    2.64                 4
 01/13/2021   20:03:22   ( -68.21,  57.89) 01/13/2021   20:02:15  ( -68.22,  57.89)    1.60                67
 01/16/2021   10:38:52   ( -68.44,-161.28) 01/16/2021   10:39:46  ( -68.44,-161.25)    1.27                54
 01/16/2021   11:29:35   (  68.27,   6.25) 01/16/2021   11:29:14  (  68.26,   6.19)    2.69                21
 01/16/2021   12:20:04   ( -67.48, 174.55) 01/16/2021   12:18:55  ( -67.55, 172.99)   66.75                69
 01/19/2021   02:05:23   (  69.48, 145.76) 01/19/2021   02:06:29  (  69.36, 148.17)   95.28                66
 01/19/2021   02:55:46   ( -68.36, -45.40) 01/19/2021   02:56:15  ( -68.37, -45.45)    1.97                29
 01/19/2021   03:46:30   (  68.25, 122.05) 01/19/2021   03:45:42  (  68.25, 122.06)    0.40                48
 01/21/2021   18:22:00   (  68.55, -97.20) 01/21/2021   18:23:11  (  68.51, -97.03)    8.08                71
 01/21/2021   19:12:40   ( -68.34,  70.39) 01/21/2021   19:12:42  ( -68.36,  70.42)    2.12                 2
 01/21/2021   20:03:23   (  68.18,-122.09) 01/21/2021   20:02:10  (  68.18,-122.15)    2.46                73