Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2021 8 14.  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)
 08/14/2021   23:34:03   ( -69.55,   3.55) 08/14/2021   23:35:11  ( -69.48,   5.36)   70.91                68
 08/15/2021   00:24:34   (  68.73, 172.01) 08/15/2021   00:24:50  (  68.71, 172.01)    2.13                16
 08/15/2021   01:15:15   ( -68.60, -20.50) 08/15/2021   01:14:20  ( -68.59, -20.50)    0.57                55
 08/17/2021   15:50:46   ( -68.82, 120.34) 08/17/2021   15:51:49  ( -68.83, 120.40)    2.40                63
 08/17/2021   16:41:30   (  68.69, -72.18) 08/17/2021   16:41:17  (  68.66, -72.17)    3.24                13
 08/17/2021   17:32:04   ( -68.18,  95.80) 08/17/2021   17:30:52  ( -68.27,  95.00)   34.80                72
 08/20/2021   08:07:42   ( -68.78,-123.84) 08/20/2021   08:08:16  ( -68.78,-123.78)    2.36                34
 08/20/2021   08:58:25   (  68.60,  43.71) 08/20/2021   08:57:44  (  68.61,  43.65)    2.50                41
 08/22/2021   23:33:59   (  69.05,-175.75) 08/22/2021   23:35:09  (  69.00,-175.26)   20.39                70
 08/23/2021   00:24:37   ( -68.75,  -8.03) 08/23/2021   00:24:42  ( -68.73,  -7.97)    3.07                 5
 08/23/2021   01:15:20   (  68.57, 159.52) 08/23/2021   01:14:10  (  68.55, 159.46)    2.83                70
 08/25/2021   15:50:51   (  68.80, -59.65) 08/25/2021   15:51:39  (  68.77, -59.67)    3.53                48
 08/25/2021   16:41:32   ( -68.66, 107.86) 08/25/2021   16:41:09  ( -68.67, 107.84)    1.55                23
 08/25/2021   17:31:59   (  67.62, -83.52) 08/25/2021   17:30:52  (  67.65, -85.71)   93.03                67