Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2021 3 15.  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)
 03/16/2021   02:04:58   ( -68.51, -32.92) 03/16/2021   02:06:10  ( -68.49, -32.97)    3.43                72
 03/16/2021   02:55:42   (  68.38, 134.56) 03/16/2021   02:55:37  (  68.37, 134.54)    0.83                 5
 03/16/2021   03:46:21   ( -68.14, -57.82) 03/16/2021   03:45:09  ( -68.15, -58.09)   11.24                72
 03/18/2021   18:21:51   ( -68.48,  82.89) 03/18/2021   18:22:36  ( -68.49,  82.91)    1.16                45
 03/18/2021   19:12:35   (  68.35,-109.63) 03/18/2021   19:12:03  (  68.37,-109.58)    3.42                32
 03/21/2021   09:48:15   (  69.18,  30.41) 03/21/2021   09:49:24  (  69.09,  31.91)   60.47                69
 03/21/2021   10:38:45   ( -68.46,-161.30) 03/21/2021   10:39:04  ( -68.43,-161.28)    3.15                19
 03/21/2021   11:29:29   (  68.33,   6.18) 03/21/2021   11:28:31  (  68.31,   6.23)    2.62                58
 03/24/2021   02:04:57   (  68.51, 147.08) 03/24/2021   02:06:01  (  68.52, 147.08)    1.03                64
 03/24/2021   02:55:38   ( -68.38, -45.43) 03/24/2021   02:55:32  ( -68.36, -45.47)    2.57                 6
 03/24/2021   03:46:16   (  67.93, 122.46) 03/24/2021   03:45:04  (  67.96, 121.70)   31.99                72
 03/26/2021   18:21:51   (  68.49, -97.12) 03/26/2021   18:22:28  (  68.50, -97.06)    2.69                37
 03/26/2021   19:12:32   ( -68.36,  70.38) 03/26/2021   19:11:59  ( -68.35,  70.39)    0.89                33