Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2021 8 12.  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)
 08/12/2021   08:07:38   (  68.77,  56.18) 08/12/2021   08:08:23  (  68.74,  56.18)    3.32                45
 08/12/2021   08:58:19   ( -68.65,-136.33) 08/12/2021   08:57:53  ( -68.63,-136.33)    1.97                26
 08/14/2021   23:34:03   ( -69.56,   3.54) 08/14/2021   23:35:11  ( -69.47,   5.35)   71.09                68
 08/15/2021   00:24:33   (  68.68, 172.07) 08/15/2021   00:24:50  (  68.70, 172.00)    3.51                17
 08/15/2021   01:15:15   ( -68.60, -20.51) 08/15/2021   01:14:20  ( -68.59, -20.50)    1.55                55
 08/17/2021   15:50:46   ( -68.83, 120.33) 08/17/2021   15:51:49  ( -68.82, 120.39)    2.28                63
 08/17/2021   16:41:29   (  68.64, -72.12) 08/17/2021   16:41:17  (  68.65, -72.18)    2.75                12
 08/17/2021   17:32:04   ( -68.19,  95.80) 08/17/2021   17:30:52  ( -68.27,  94.99)   34.51                72
 08/20/2021   08:07:42   ( -68.79,-123.85) 08/20/2021   08:08:16  ( -68.77,-123.79)    2.64                34
 08/20/2021   08:58:25   (  68.61,  43.70) 08/20/2021   08:57:44  (  68.60,  43.64)    2.58                41
 08/22/2021   23:33:58   (  69.00,-175.69) 08/22/2021   23:35:10  (  68.93,-175.34)   15.56                72
 08/23/2021   00:24:36   ( -68.70,  -7.96) 08/23/2021   00:24:42  ( -68.72,  -7.98)    2.78                 6
 08/23/2021   01:15:20   (  68.57, 159.51) 08/23/2021   01:14:09  (  68.60, 159.52)    2.72                71
 08/25/2021   15:50:51   (  68.81, -59.66) 08/25/2021   15:51:38  (  68.81, -59.61)    2.06                47
 08/25/2021   16:41:32   ( -68.66, 107.86) 08/25/2021   16:41:09  ( -68.66, 107.83)    1.06                23
 08/25/2021   17:31:58   (  67.57, -83.46) 08/25/2021   17:30:52  (  67.64, -85.73)   96.59                66