Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2021 12 18.  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)
 12/18/2021   05:36:11   ( -69.16, -86.26) 12/18/2021   05:37:20  ( -69.17, -86.26)    1.37                69
 12/18/2021   06:26:55   (  69.03,  81.23) 12/18/2021   06:26:48  (  69.01,  81.18)    2.81                 7
 12/18/2021   07:17:33   ( -68.74,-111.06) 12/18/2021   07:16:20  ( -68.78,-111.47)   17.14                73
 12/20/2021   21:53:03   ( -69.16,  29.52) 12/20/2021   21:53:46  ( -69.15,  29.59)    2.80                43
 12/20/2021   22:43:46   (  68.98,-162.92) 12/20/2021   22:43:14  (  68.99,-162.97)    2.42                32
 12/23/2021   13:19:24   (  69.82, -22.97) 12/23/2021   13:20:33  (  69.73, -21.39)   61.58                69
 12/23/2021   14:09:54   ( -69.11, 145.38) 12/23/2021   14:10:12  ( -69.12, 145.43)    3.03                18
 12/23/2021   15:00:38   (  68.98, -47.15) 12/23/2021   14:59:40  (  68.95, -47.14)    2.98                58
 12/26/2021   05:36:03   (  69.19,  93.72) 12/26/2021   05:37:07  (  69.19,  93.77)    2.14                64
 12/26/2021   06:26:44   ( -69.06, -98.77) 12/26/2021   06:26:38  ( -69.03, -98.80)    2.72                 6
 12/26/2021   07:17:21   (  68.56,  69.20) 12/26/2021   07:16:10  (  68.64,  68.35)   35.78                71
 12/28/2021   21:52:54   (  69.15,-150.44) 12/28/2021   21:53:33  (  69.15,-150.41)    1.24                39
 12/28/2021   22:43:35   ( -69.01,  17.07) 12/28/2021   22:43:04  ( -68.99,  17.02)    2.71                31
 12/31/2021   13:19:13   ( -69.85, 157.02) 12/31/2021   13:20:22  ( -69.77, 158.65)   63.34                69
 12/31/2021   14:09:45   (  69.10, -34.60) 12/31/2021   14:09:59  (  69.10, -34.59)    0.79                14
 12/31/2021   15:00:27   ( -69.01, 132.84) 12/31/2021   14:59:29  ( -69.00, 132.91)    3.24                58