Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2021 8 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)
 08/12/2021   08:07:38   (  68.74,  56.22) 08/12/2021   08:08:23  (  68.77,  56.21)    3.51                45
 08/12/2021   08:58:19   ( -68.61,-136.29) 08/12/2021   08:57:54  ( -68.61,-136.36)    2.84                25
 08/14/2021   23:34:04   ( -69.58,   3.51) 08/14/2021   23:35:12  ( -69.45,   5.32)   71.91                68
 08/15/2021   00:24:34   (  68.70, 172.04) 08/15/2021   00:24:50  (  68.73, 172.04)    3.20                16
 08/15/2021   01:15:15   ( -68.57, -20.47) 08/15/2021   01:14:21  ( -68.57, -20.53)    2.44                54
 08/17/2021   15:50:45   ( -68.79, 120.38) 08/17/2021   15:51:49  ( -68.80, 120.36)    1.17                64
 08/17/2021   16:41:29   (  68.67, -72.15) 08/17/2021   16:41:16  (  68.68, -72.14)    2.15                13
 08/17/2021   17:32:04   ( -68.21,  95.77) 08/17/2021   17:30:52  ( -68.25,  94.96)   33.56                72
 08/20/2021   08:07:41   ( -68.75,-123.80) 08/20/2021   08:08:16  ( -68.75,-123.82)    0.59                35
 08/20/2021   08:58:25   (  68.63,  43.67) 08/20/2021   08:57:43  (  68.63,  43.68)    0.50                42
 08/22/2021   23:33:59   (  69.02,-175.72) 08/22/2021   23:35:10  (  68.97,-175.30)   17.72                71
 08/23/2021   00:24:37   ( -68.72,  -7.99) 08/23/2021   00:24:43  ( -68.70,  -8.00)    1.95                 6
 08/23/2021   01:15:21   (  68.60, 159.48) 08/23/2021   01:14:10  (  68.58, 159.49)    2.32                71