Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2021 7 28.  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)
 07/30/2021   00:24:25   (  68.74, 172.01) 07/30/2021   00:25:06  (  68.72, 172.03)    2.52                41
 07/30/2021   01:15:06   ( -68.61, -20.50) 07/30/2021   01:14:36  ( -68.60, -20.48)    0.87                30
 08/01/2021   15:50:47   ( -69.41, 119.55) 08/01/2021   15:51:56  ( -69.31, 121.01)   58.49                69
 08/01/2021   16:41:20   (  68.69, -72.15) 08/01/2021   16:41:32  (  68.70, -72.12)    1.59                12
 08/01/2021   17:32:01   ( -68.56,  95.34) 08/01/2021   17:31:03  ( -68.53,  95.31)    2.95                58
 08/04/2021   08:07:32   ( -68.77,-123.80) 08/04/2021   08:08:32  ( -68.79,-123.78)    2.06                60
 08/04/2021   08:58:16   (  68.64,  43.68) 08/04/2021   08:58:00  (  68.61,  43.66)    3.18                16
 08/04/2021   09:48:48   ( -68.02,-148.21) 08/04/2021   09:47:37  ( -68.12,-149.30)   46.76                71
 08/07/2021   00:24:28   ( -68.72,  -7.97) 08/07/2021   00:25:00  ( -68.70,  -8.00)    2.67                32
 08/07/2021   01:15:12   (  68.60, 159.50) 08/07/2021   01:14:27  (  68.58, 159.50)    1.74                45
 08/09/2021   15:50:44   (  68.87, -59.73) 08/09/2021   15:51:56  (  68.82, -59.61)    7.53                72
 08/09/2021   16:41:24   ( -68.68, 107.85) 08/09/2021   16:41:27  ( -68.66, 107.83)    1.57                 3
 08/09/2021   17:32:07   (  68.50, -84.60) 08/09/2021   17:30:54  (  68.54, -84.67)    5.42                73