Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2021 6 14.  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)
 06/14/2021   16:41:00   (  69.56, -73.26) 06/14/2021   16:42:07  (  69.49, -71.10)   84.48                67
 06/14/2021   17:31:26   ( -68.61,  95.36) 06/14/2021   17:31:51  ( -68.61,  95.40)    1.59                25
 06/14/2021   18:22:09   (  68.44, -97.10) 06/14/2021   18:21:19  (  68.44, -97.16)    2.73                50
 06/17/2021   08:57:41   (  68.67,  43.73) 06/17/2021   08:58:49  (  68.65,  43.69)    3.20                68
 06/17/2021   09:48:22   ( -68.53,-148.76) 06/17/2021   09:48:19  ( -68.54,-148.80)    2.53                 3
 06/17/2021   10:39:02   (  68.19,  18.99) 06/17/2021   10:37:49  (  68.26,  18.50)   21.34                73
 06/20/2021   01:14:38   (  68.65, 159.53) 06/20/2021   01:15:16  (  68.63, 159.55)    1.66                38
 06/20/2021   02:05:19   ( -68.50, -32.95) 06/20/2021   02:04:47  ( -68.47, -33.01)    3.28                32
 06/22/2021   16:40:59   ( -69.21, 107.21) 06/22/2021   16:42:09  ( -69.07, 108.33)   47.18                70
 06/22/2021   17:31:33   (  68.57, -84.60) 06/22/2021   17:31:43  (  68.55, -84.66)    2.94                10
 06/22/2021   18:22:15   ( -68.47,  82.85) 06/22/2021   18:21:13  ( -68.46,  82.85)    1.35                62
 06/25/2021   08:57:46   ( -68.65,-136.26) 06/25/2021   08:58:43  ( -68.65,-136.31)    1.94                57
 06/25/2021   09:48:30   (  68.54,  31.20) 06/25/2021   09:48:10  (  68.53,  31.18)    1.66                20
 06/25/2021   10:39:00   ( -67.80,-160.54) 06/25/2021   10:37:50  ( -67.88,-161.96)   60.13                70
 06/28/2021   00:24:18   (  69.64, 170.81) 06/28/2021   00:25:25  (  69.55, 173.09)   89.12                67
 06/28/2021   01:14:43   ( -68.63, -20.47) 06/28/2021   01:15:10  ( -68.63, -20.46)    0.76                27
 06/28/2021   02:05:27   (  68.52, 146.99) 06/28/2021   02:04:37  (  68.50, 147.03)    3.11                50