Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2021 4 7.  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)
 04/09/2021   02:04:51   (  68.53, 147.09) 04/09/2021   02:05:50  (  68.52, 147.06)    1.57                59
 04/09/2021   02:55:32   ( -68.40, -45.43) 04/09/2021   02:55:20  ( -68.41, -45.44)    0.61                12
 04/09/2021   03:46:06   (  67.73, 122.73) 04/09/2021   03:44:56  (  67.79, 121.48)   52.95                70
 04/11/2021   18:21:44   (  68.47, -97.07) 04/11/2021   18:22:18  (  68.49, -97.09)    2.56                34
 04/11/2021   19:12:26   ( -68.40,  70.35) 04/11/2021   19:11:48  ( -68.39,  70.41)    2.76                38
 04/14/2021   09:48:01   ( -69.03,-149.34) 04/14/2021   09:49:12  ( -68.91,-148.34)   42.04                71
 04/14/2021   10:38:37   (  68.47,  18.71) 04/14/2021   10:38:45  (  68.47,  18.75)    1.95                 8
 04/14/2021   11:29:18   ( -68.34,-173.80) 04/14/2021   11:28:15  ( -68.36,-173.74)    3.27                63
 04/17/2021   02:04:46   ( -68.55, -32.92) 04/17/2021   02:05:46  ( -68.55, -32.91)    0.57                60
 04/17/2021   02:55:30   (  68.42, 134.55) 04/17/2021   02:55:13  (  68.43, 134.59)    1.83                17
 04/17/2021   03:46:02   ( -67.80, -57.34) 04/17/2021   03:44:51  ( -67.89, -58.42)   46.17                71
 04/19/2021   18:21:39   ( -68.50,  82.93) 04/19/2021   18:22:14  ( -68.52,  82.92)    2.45                35
 04/19/2021   19:12:23   (  68.38,-109.61) 04/19/2021   19:11:41  (  68.40,-109.58)    2.57                42