Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2021 6 26.  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)
 06/28/2021   00:24:19   (  69.68, 170.75) 06/28/2021   00:25:25  (  69.55, 173.10)   92.18                66
 06/28/2021   01:14:43   ( -68.64, -20.47) 06/28/2021   01:15:10  ( -68.61, -20.48)    2.65                27
 06/28/2021   02:05:27   (  68.51, 147.00) 06/28/2021   02:04:37  (  68.50, 147.03)    1.82                50
 06/30/2021   16:40:58   (  68.70, -72.11) 06/30/2021   16:42:07  (  68.68, -72.14)    2.39                69
 06/30/2021   17:31:39   ( -68.56,  95.40) 06/30/2021   17:31:37  ( -68.58,  95.36)    2.82                 2
 06/30/2021   18:22:19   (  68.22, -96.85) 06/30/2021   18:21:07  (  68.29, -97.34)   21.56                72
 07/03/2021   08:57:53   (  68.63,  43.76) 07/03/2021   08:58:33  (  68.64,  43.69)    3.34                40
 07/03/2021   09:48:35   ( -68.53,-148.81) 07/03/2021   09:48:03  ( -68.54,-148.81)    0.69                32
 07/06/2021   00:24:16   ( -69.25,  -8.65) 07/06/2021   00:25:26  ( -69.10,  -7.50)   48.58                70
 07/06/2021   01:14:50   (  68.60, 159.55) 07/06/2021   01:15:00  (  68.59, 159.51)    2.02                10
 07/06/2021   02:05:32   ( -68.51, -33.01) 07/06/2021   02:04:30  ( -68.50, -32.98)    2.20                62
 07/08/2021   16:41:03   ( -68.70, 107.87) 07/08/2021   16:41:59  ( -68.72, 107.90)    2.66                56
 07/08/2021   17:31:47   (  68.58, -84.66) 07/08/2021   17:31:26  (  68.60, -84.61)    2.61                21
 07/08/2021   18:22:17   ( -67.85,  83.60) 07/08/2021   18:21:07  ( -67.89,  82.18)   59.59                70