Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2021 6 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)
 06/12/2021   01:14:29   ( -68.64, -20.43) 06/12/2021   01:15:24  ( -68.62, -20.46)    2.39                55
 06/12/2021   02:05:13   (  68.52, 147.03) 06/12/2021   02:04:51  (  68.51, 147.04)    1.54                22
 06/12/2021   02:55:42   ( -67.73, -44.65) 06/12/2021   02:54:32  ( -67.79, -46.17)   64.55                70
 06/14/2021   16:41:00   (  69.59, -73.31) 06/14/2021   16:42:07  (  69.50, -71.09)   86.77                67
 06/14/2021   17:31:25   ( -68.59,  95.40) 06/14/2021   17:31:51  ( -68.62,  95.41)    3.26                26
 06/14/2021   18:22:09   (  68.47, -97.14) 06/14/2021   18:21:19  (  68.44, -97.16)    3.24                50
 06/17/2021   08:57:40   (  68.69,  43.71) 06/17/2021   08:58:48  (  68.71,  43.77)    3.09                68
 06/17/2021   09:48:21   ( -68.54,-148.77) 06/17/2021   09:48:19  ( -68.55,-148.79)    1.67                 2
 06/17/2021   10:39:01   (  68.21,  18.97) 06/17/2021   10:37:49  (  68.26,  18.51)   19.79                72
 06/20/2021   01:14:35   (  68.65, 159.54) 06/20/2021   01:15:15  (  68.64, 159.56)    1.47                40
 06/20/2021   02:05:16   ( -68.50, -32.94) 06/20/2021   02:04:46  ( -68.49, -32.99)    2.36                30
 06/22/2021   16:40:58   ( -69.30, 107.10) 06/22/2021   16:42:07  ( -69.19, 108.48)   56.06                69
 06/22/2021   17:31:31   (  68.61, -84.64) 06/22/2021   17:31:42  (  68.62, -84.59)    2.37                11
 06/22/2021   18:22:12   ( -68.45,  82.88) 06/22/2021   18:21:13  ( -68.47,  82.86)    1.89                59