Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2021 8 13.  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   23:34:04   ( -69.57,   3.52) 08/14/2021   23:35:12  ( -69.46,   5.33)   71.69                68
 08/15/2021   00:24:34   (  68.70, 172.05) 08/15/2021   00:24:51  (  68.68, 171.98)    2.89                17
 08/15/2021   01:15:14   ( -68.57, -20.46) 08/15/2021   01:14:20  ( -68.57, -20.52)    2.58                54
 08/17/2021   15:50:45   ( -68.79, 120.38) 08/17/2021   15:51:49  ( -68.81, 120.37)    2.07                64
 08/17/2021   16:41:29   (  68.66, -72.14) 08/17/2021   16:41:17  (  68.64, -72.20)    3.31                12
 08/17/2021   17:32:04   ( -68.20,  95.78) 08/17/2021   17:30:52  ( -68.25,  94.97)   33.67                72
 08/20/2021   08:07:41   ( -68.75,-123.80) 08/20/2021   08:08:16  ( -68.76,-123.81)    1.15                35
 08/20/2021   08:58:25   (  68.62,  43.68) 08/20/2021   08:57:43  (  68.64,  43.69)    2.20                42
 08/22/2021   23:33:59   (  69.02,-175.71) 08/22/2021   23:35:10  (  68.98,-175.29)   17.37                71
 08/23/2021   00:24:37   ( -68.71,  -7.98) 08/23/2021   00:24:43  ( -68.71,  -7.99)    0.77                 6
 08/23/2021   01:15:21   (  68.59, 159.49) 08/23/2021   01:14:10  (  68.59, 159.50)    0.71                71
 08/25/2021   15:50:52   (  68.83, -59.68) 08/25/2021   15:51:39  (  68.81, -59.62)    3.15                47
 08/25/2021   16:41:32   ( -68.68, 107.83) 08/25/2021   16:41:09  ( -68.65, 107.82)    3.12                23
 08/25/2021   17:31:58   (  67.59, -83.48) 08/25/2021   17:30:52  (  67.63, -85.74)   95.90                66