Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2015 8 21.  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)
 08/23/2015   00:28:03   ( -69.76,  -9.22) 08/23/2015   00:29:09  ( -69.65,  -6.89)   90.83                66
 08/23/2015   01:18:30   (  68.74, 159.53) 08/23/2015   01:18:51  (  68.71, 159.53)    2.99                21
 08/23/2015   02:09:11   ( -68.60, -32.97) 08/23/2015   02:08:21  ( -68.60, -32.97)    0.42                50
 08/25/2015   16:44:39   ( -68.90, 107.78) 08/25/2015   16:45:50  ( -68.87, 107.98)    8.55                71
 08/25/2015   17:35:21   (  68.67, -84.61) 08/25/2015   17:35:18  (  68.70, -84.59)    3.35                 3
 08/25/2015   18:26:02   ( -68.53,  82.89) 08/25/2015   18:24:49  ( -68.54,  82.84)    1.97                73
 08/28/2015   09:01:28   ( -68.78,-136.29) 08/28/2015   09:02:17  ( -68.80,-136.23)    3.07                49
 08/28/2015   09:52:11   (  68.61,  31.25) 08/28/2015   09:51:45  (  68.62,  31.20)    2.47                26
 08/28/2015   10:42:37   ( -67.66,-160.24) 08/28/2015   10:41:29  ( -67.74,-162.21)   83.72                68
 08/31/2015   00:27:54   (  69.71, 170.86) 08/31/2015   00:29:01  (  69.59, 173.06)   86.47                67
 08/31/2015   01:18:19   ( -68.72, -20.43) 08/31/2015   01:18:45  ( -68.71, -20.44)    1.11                26
 08/31/2015   02:09:03   (  68.60, 147.03) 08/31/2015   02:08:12  (  68.59, 147.05)    1.63                51
 09/02/2015   16:44:30   (  68.86, -72.16) 09/02/2015   16:45:41  (  68.83, -72.04)    6.15                71
 09/02/2015   17:35:10   ( -68.66,  95.41) 09/02/2015   17:35:12  ( -68.67,  95.40)    0.97                 2
 09/02/2015   18:25:53   (  68.49, -97.05) 09/02/2015   18:24:40  (  68.49, -97.18)    5.02                73