Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2021 12 21.  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)
 12/23/2021   13:19:24   (  69.86, -23.02) 12/23/2021   13:20:32  (  69.75, -21.38)   64.51                68
 12/23/2021   14:09:53   ( -69.09, 145.40) 12/23/2021   14:10:12  ( -69.08, 145.37)    1.64                19
 12/23/2021   15:00:37   (  68.96, -47.12) 12/23/2021   14:59:39  (  68.97, -47.12)    0.66                58
 12/26/2021   05:36:03   (  69.18,  93.74) 12/26/2021   05:37:07  (  69.20,  93.77)    2.51                64
 12/26/2021   06:26:44   ( -69.05, -98.76) 12/26/2021   06:26:38  ( -69.03, -98.81)    2.43                 6
 12/26/2021   07:17:21   (  68.55,  69.22) 12/26/2021   07:16:10  (  68.64,  68.35)   36.86                71
 12/28/2021   21:52:54   (  69.14,-150.43) 12/28/2021   21:53:33  (  69.13,-150.43)    0.74                39
 12/28/2021   22:43:35   ( -69.00,  17.08) 12/28/2021   22:43:03  ( -69.03,  17.07)    2.59                32
 12/31/2021   13:19:12   ( -69.86, 157.01) 12/31/2021   13:20:21  ( -69.73, 158.60)   62.81                69
 12/31/2021   14:09:44   (  69.11, -34.60) 12/31/2021   14:09:57  (  69.12, -34.57)    1.66                13
 12/31/2021   15:00:25   ( -68.97, 132.91) 12/31/2021   14:59:28  ( -68.96, 132.86)    2.18                57
 01/03/2022   05:35:51   ( -69.19, -86.24) 01/03/2022   05:36:55  ( -69.21, -86.21)    2.43                64
 01/03/2022   06:26:35   (  69.08,  81.22) 01/03/2022   06:26:22  (  69.09,  81.28)    2.46                13
 01/03/2022   07:17:10   ( -68.62,-110.84) 01/03/2022   07:15:58  ( -68.65,-111.63)   32.63                72