Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2021 8 30.  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)
 08/30/2021   23:33:58   ( -68.83,   4.55) 08/30/2021   23:35:04  ( -68.86,   4.55)    3.63                66
 08/31/2021   00:24:42   (  68.69, 172.03) 08/31/2021   00:24:32  (  68.69, 171.99)    1.56                10
 08/31/2021   01:15:18   ( -68.29, -20.12) 08/31/2021   01:14:06  ( -68.36, -20.78)   27.97                72
 09/02/2021   15:50:54   ( -68.80, 120.35) 09/02/2021   15:51:31  ( -68.78, 120.34)    2.15                37
 09/02/2021   16:41:37   (  68.67, -72.17) 09/02/2021   16:40:57  (  68.67, -72.16)    0.84                40
 09/05/2021   07:17:12   (  69.13,  68.35) 09/05/2021   07:18:23  (  69.02,  68.89)   24.86                71
 09/05/2021   08:07:49   ( -68.78,-123.85) 09/05/2021   08:07:56  ( -68.75,-123.82)    3.13                 7
 09/05/2021   08:58:33   (  68.65,  43.62) 09/05/2021   08:57:23  (  68.63,  43.68)    3.43                70
 09/07/2021   23:34:02   (  68.80,-175.42) 09/07/2021   23:34:52  (  68.81,-175.49)    3.26                50
 09/08/2021   00:24:44   ( -68.70,  -7.98) 09/08/2021   00:24:22  ( -68.71,  -7.98)    0.89                22
 09/08/2021   01:15:11   (  67.67, 160.65) 09/08/2021   01:14:04  (  67.75, 158.52)   90.08                67
 09/10/2021   15:00:30   ( -69.75, 131.70) 09/10/2021   15:01:37  ( -69.66, 133.85)   83.76                67
 09/10/2021   15:50:58   (  68.78, -59.64) 09/10/2021   15:51:18  (  68.76, -59.67)    2.63                20
 09/10/2021   16:41:40   ( -68.69, 107.81) 09/10/2021   16:40:48  ( -68.66, 107.84)    2.92                52
 09/13/2021   07:17:10   ( -68.88,-111.31) 09/13/2021   07:18:16  ( -68.89,-111.27)    1.58                66
 09/13/2021   08:07:53   (  68.78,  56.14) 09/13/2021   08:07:42  (  68.76,  56.22)    3.35                11
 09/13/2021   08:58:29   ( -68.35,-135.98) 09/13/2021   08:57:17  ( -68.39,-136.61)   26.04                72