Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2021 7 22.  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)
 07/24/2021   15:50:49   (  69.71, -60.89) 07/24/2021   15:51:56  (  69.61, -58.57)   90.34                67
 07/24/2021   16:41:13   ( -68.67, 107.89) 07/24/2021   16:41:41  ( -68.67, 107.85)    1.54                28
 07/24/2021   17:31:57   (  68.54, -84.63) 07/24/2021   17:31:08  (  68.56, -84.64)    2.57                49
 07/27/2021   08:07:29   (  68.80,  56.16) 07/27/2021   08:08:38  (  68.78,  56.23)    3.56                69
 07/27/2021   08:58:10   ( -68.67,-136.34) 07/27/2021   08:58:08  ( -68.67,-136.27)    2.80                 2
 07/27/2021   09:48:50   (  68.32,  31.42) 07/27/2021   09:47:38  (  68.39,  31.03)   17.85                72
 07/30/2021   00:24:25   (  68.75, 172.00) 07/30/2021   00:25:06  (  68.72, 172.03)    3.13                41
 07/30/2021   01:15:06   ( -68.61, -20.50) 07/30/2021   01:14:36  ( -68.62, -20.46)    1.51                30
 08/01/2021   15:50:48   ( -69.40, 119.55) 08/01/2021   15:51:57  ( -69.33, 121.04)   59.12                69
 08/01/2021   16:41:21   (  68.69, -72.16) 08/01/2021   16:41:33  (  68.71, -72.10)    3.58                12
 08/01/2021   17:32:02   ( -68.55,  95.34) 08/01/2021   17:31:04  ( -68.56,  95.34)    0.47                58
 08/04/2021   08:07:32   ( -68.76,-123.80) 08/04/2021   08:08:33  ( -68.77,-123.79)    1.37                61
 08/04/2021   08:58:16   (  68.64,  43.68) 08/04/2021   08:58:00  (  68.65,  43.70)    1.84                16
 08/04/2021   09:48:49   ( -68.07,-148.27) 08/04/2021   09:47:38  ( -68.11,-149.32)   43.84                71