Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2021 6 11.  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   ( -68.63, -20.42) 06/12/2021   01:15:24  ( -68.63, -20.45)    1.27                55
 06/12/2021   02:05:13   (  68.51, 147.05) 06/12/2021   02:04:51  (  68.52, 147.06)    0.94                22
 06/12/2021   02:55:42   ( -67.72, -44.64) 06/12/2021   02:54:33  ( -67.74, -46.23)   67.06                69
 06/14/2021   16:41:01   (  69.63, -73.37) 06/14/2021   16:42:07  (  69.51, -71.08)   90.12                66
 06/14/2021   17:31:25   ( -68.58,  95.41) 06/14/2021   17:31:52  ( -68.57,  95.36)    2.41                27
 06/14/2021   18:22:09   (  68.46, -97.12) 06/14/2021   18:21:19  (  68.46, -97.14)    0.98                50
 06/17/2021   08:57:39   (  68.68,  43.73) 06/17/2021   08:58:48  (  68.67,  43.72)    1.67                69
 06/17/2021   09:48:21   ( -68.59,-148.83) 06/17/2021   09:48:18  ( -68.57,-148.77)    3.07                 3
 06/17/2021   10:39:00   (  68.20,  18.98) 06/17/2021   10:37:48  (  68.28,  18.52)   20.63                72
 06/20/2021   01:14:35   (  68.64, 159.55) 06/20/2021   01:15:15  (  68.65, 159.58)    1.82                40
 06/20/2021   02:05:16   ( -68.49, -32.93) 06/20/2021   02:04:46  ( -68.50, -32.98)    2.35                30
 06/22/2021   16:40:58   ( -69.29, 107.11) 06/22/2021   16:42:07  ( -69.20, 108.50)   55.82                69
 06/22/2021   17:31:31   (  68.60, -84.63) 06/22/2021   17:31:43  (  68.58, -84.64)    2.39                12
 06/22/2021   18:22:13   ( -68.50,  82.82) 06/22/2021   18:21:13  ( -68.48,  82.88)    2.88                60