Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2020 12 8.  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)
 12/10/2020   02:55:40   (  68.38, 134.64) 12/10/2020   02:56:27  (  68.37, 134.58)    3.08                47
 12/10/2020   03:46:21   ( -68.25, -57.88) 12/10/2020   03:45:57  ( -68.26, -57.92)    1.91                24
 12/10/2020   04:36:47   (  67.15, 110.78) 12/10/2020   04:35:41  (  67.19, 108.51)   98.20                66
 12/12/2020   18:22:06   ( -69.42,  81.69) 12/12/2020   18:23:12  ( -69.33,  84.03)   91.90                66
 12/12/2020   19:12:32   (  68.33,-109.52) 12/12/2020   19:12:55  (  68.33,-109.59)    2.76                23
 12/12/2020   20:03:13   ( -68.20,  57.97) 12/12/2020   20:02:25  ( -68.22,  57.92)    2.84                48
 12/15/2020   10:38:43   ( -68.58,-161.37) 12/15/2020   10:39:54  ( -68.51,-161.13)   11.99                71
 12/15/2020   11:29:25   (  68.34,   6.24) 12/15/2020   11:29:22  (  68.34,   6.31)    2.80                 3
 12/15/2020   12:20:06   ( -68.21, 173.73) 12/15/2020   12:18:53  ( -68.18, 173.75)    3.31                73
 12/18/2020   02:55:33   ( -68.42, -45.39) 12/18/2020   02:56:23  ( -68.41, -45.37)    1.93                50
 12/18/2020   03:46:17   (  68.30, 122.07) 12/18/2020   03:45:50  (  68.29, 122.13)    3.00                27
 12/18/2020   04:36:43   ( -67.36, -69.44) 12/18/2020   04:35:34  ( -67.40, -71.25)   77.66                69
 12/20/2020   18:21:59   (  69.38, -98.23) 12/20/2020   18:23:05  (  69.29, -96.01)   88.00                66
 12/20/2020   19:12:24   ( -68.38,  70.44) 12/20/2020   19:12:50  ( -68.35,  70.45)    3.27                26
 12/20/2020   20:03:07   (  68.21,-122.03) 12/20/2020   20:02:17  (  68.23,-122.05)    2.16                50