Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2021 6 27.  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   00:24:18   (  69.66, 170.79) 06/28/2021   00:25:24  (  69.58, 173.14)   91.38                66
 06/28/2021   01:14:42   ( -68.61, -20.43) 06/28/2021   01:15:09  ( -68.64, -20.44)    3.22                27
 06/28/2021   02:05:26   (  68.48, 147.04) 06/28/2021   02:04:37  (  68.47, 146.99)    2.36                49
 06/30/2021   16:40:58   (  68.73, -72.15) 06/30/2021   16:42:06  (  68.71, -72.11)    2.68                68
 06/30/2021   17:31:39   ( -68.59,  95.36) 06/30/2021   17:31:36  ( -68.60,  95.39)    2.33                 3
 06/30/2021   18:22:19   (  68.25, -96.89) 06/30/2021   18:21:06  (  68.32, -97.31)   18.78                73
 07/03/2021   08:57:54   (  68.66,  43.71) 07/03/2021   08:58:33  (  68.67,  43.72)    0.89                39
 07/03/2021   09:48:35   ( -68.52,-148.78) 07/03/2021   09:48:04  ( -68.51,-148.84)    2.67                31
 07/06/2021   00:24:16   ( -69.24,  -8.63) 07/06/2021   00:25:26  ( -69.13,  -7.47)   47.77                70
 07/06/2021   01:14:50   (  68.59, 159.57) 07/06/2021   01:15:00  (  68.62, 159.54)    3.14                10
 07/06/2021   02:05:32   ( -68.50, -32.99) 07/06/2021   02:04:30  ( -68.52, -32.95)    2.73                62
 07/08/2021   16:41:02   ( -68.70, 107.88) 07/08/2021   16:41:59  ( -68.69, 107.86)    1.43                57
 07/08/2021   17:31:46   (  68.58, -84.65) 07/08/2021   17:31:26  (  68.56, -84.65)    1.98                20
 07/08/2021   18:22:16   ( -67.84,  83.61) 07/08/2021   18:21:06  ( -67.91,  82.21)   59.19                70