Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2021 7 24.  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)
 07/24/2021   15:50:50   (  69.73, -60.92) 07/24/2021   15:51:56  (  69.65, -58.52)   92.96                66
 07/24/2021   16:41:14   ( -68.70, 107.86) 07/24/2021   16:41:41  ( -68.70, 107.89)    1.37                27
 07/24/2021   17:31:58   (  68.56, -84.66) 07/24/2021   17:31:09  (  68.54, -84.67)    2.55                49
 07/27/2021   08:07:28   (  68.77,  56.20) 07/27/2021   08:08:38  (  68.75,  56.19)    2.11                70
 07/27/2021   08:58:09   ( -68.64,-136.30) 07/27/2021   08:58:08  ( -68.64,-136.31)    0.59                 1
 07/27/2021   09:48:50   (  68.34,  31.39) 07/27/2021   09:47:37  (  68.42,  31.06)   15.91                73
 07/30/2021   00:24:24   (  68.71, 172.04) 07/30/2021   00:25:05  (  68.74, 172.05)    2.54                41
 07/30/2021   01:15:05   ( -68.58, -20.46) 07/30/2021   01:14:36  ( -68.58, -20.51)    2.25                29
 08/01/2021   15:50:47   ( -69.37, 119.59) 08/01/2021   15:51:57  ( -69.28, 120.98)   55.44                70
 08/01/2021   16:41:20   (  68.66, -72.12) 08/01/2021   16:41:33  (  68.66, -72.16)    1.64                13
 08/01/2021   17:32:02   ( -68.58,  95.31) 08/01/2021   17:31:03  ( -68.56,  95.35)    2.51                59
 08/04/2021   08:07:33   ( -68.79,-123.83) 08/04/2021   08:08:33  ( -68.76,-123.81)    3.22                60
 08/04/2021   08:58:17   (  68.66,  43.64) 08/04/2021   08:58:00  (  68.64,  43.69)    3.31                17
 08/04/2021   09:48:49   ( -68.04,-148.23) 08/04/2021   09:47:38  ( -68.09,-149.33)   46.13                71
 08/07/2021   00:24:28   ( -68.73,  -7.99) 08/07/2021   00:24:59  ( -68.73,  -7.96)    1.32                31
 08/07/2021   01:15:12   (  68.61, 159.48) 08/07/2021   01:14:26  (  68.61, 159.53)    2.32                46