Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2021 1 22.  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)
 01/24/2021   10:38:53   (  68.40,  18.76) 01/24/2021   10:39:41  (  68.40,  18.71)    2.32                48
 01/24/2021   11:29:35   ( -68.31,-173.80) 01/24/2021   11:29:11  ( -68.29,-173.79)    2.24                24
 01/24/2021   12:20:01   (  67.22,  -5.15) 01/24/2021   12:18:54  (  67.28,  -7.30)   92.65                67
 01/27/2021   02:05:20   ( -69.41, -34.15) 01/27/2021   02:06:27  ( -69.26, -31.97)   86.89                67
 01/27/2021   02:55:47   (  68.39, 134.55) 01/27/2021   02:56:08  (  68.37, 134.56)    2.01                21
 01/27/2021   03:46:28   ( -68.24, -57.94) 01/27/2021   03:45:38  ( -68.27, -57.94)    2.95                50
 01/29/2021   18:21:57   ( -68.44,  82.95) 01/29/2021   18:23:09  ( -68.46,  82.90)    3.32                72
 01/29/2021   19:12:41   (  68.33,-109.60) 01/29/2021   19:12:36  (  68.34,-109.60)    1.64                 5
 01/29/2021   20:03:21   ( -68.12,  57.98) 01/29/2021   20:02:08  ( -68.13,  57.78)    8.37                73
 02/01/2021   10:38:52   ( -68.43,-161.27) 02/01/2021   10:39:37  ( -68.43,-161.26)    0.48                45
 02/01/2021   11:29:36   (  68.32,   6.18) 02/01/2021   11:29:04  (  68.31,   6.24)    2.98                32
 02/04/2021   02:05:16   (  69.12, 146.26) 02/04/2021   02:06:25  (  69.05, 147.76)   60.17                69
 02/04/2021   02:55:46   ( -68.37, -45.42) 02/04/2021   02:56:05  ( -68.39, -45.42)    2.82                19
 02/04/2021   03:46:30   (  68.26, 122.02) 02/04/2021   03:45:32  (  68.27, 122.08)    2.39                58