Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2021 5 1.  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)
 05/03/2021   02:04:43   ( -68.57, -32.92) 05/03/2021   02:05:34  ( -68.54, -32.94)    2.90                51
 05/03/2021   02:55:27   (  68.44, 134.55) 05/03/2021   02:55:01  (  68.43, 134.57)    1.02                26
 05/03/2021   03:45:53   ( -67.49, -56.95) 05/03/2021   03:44:45  ( -67.54, -58.83)   80.26                68
 05/05/2021   17:31:12   (  69.37, -85.58) 05/05/2021   17:32:20  (  69.24, -83.81)   71.11                68
 05/05/2021   18:21:40   ( -68.53,  82.88) 05/05/2021   18:22:01  ( -68.52,  82.92)    2.02                21
 05/05/2021   19:12:23   (  68.35,-109.58) 05/05/2021   19:11:29  (  68.35,-109.64)    2.78                54
 05/08/2021   09:47:54   (  68.60,  31.24) 05/08/2021   09:48:57  (  68.60,  31.26)    0.68                63
 05/08/2021   10:38:35   ( -68.45,-161.25) 05/08/2021   10:38:28  ( -68.44,-161.30)    2.63                 7
 05/08/2021   11:29:12   (  67.95,   6.70) 05/08/2021   11:28:01  (  67.98,   5.81)   37.42                71
 05/11/2021   02:04:51   (  68.57, 147.04) 05/11/2021   02:05:24  (  68.56, 147.10)    2.72                33
 05/11/2021   02:55:32   ( -68.42, -45.45) 05/11/2021   02:54:55  ( -68.41, -45.46)    2.10                37
 05/13/2021   17:31:09   ( -68.93,  95.01) 05/13/2021   17:32:21  ( -68.81,  95.64)   28.66                72
 05/13/2021   18:21:47   (  68.50, -97.10) 05/13/2021   18:21:51  (  68.52, -97.07)    2.48                 4
 05/13/2021   19:12:28   ( -68.35,  70.41) 05/13/2021   19:11:22  ( -68.37,  70.37)    2.69                66