It's a military mission and it looks like many are wondering if 3 satellites will be deployed (confirming that the 2001 identical launch was a failure) forming a triangle in space. If it's the NOSS, then the amateurs will know it pretty soon. The Atlas last stage rocket should also be in the neighborhood of the two or three satellites. (15 to 20 seconds ahead of the satellites at the second orbit and distance increasing).
I'v seen them once (the previous trio) , by chance and it's quite amazing: very slow compared to other satellites and in perfect formation (well with a right angle).
The new one's TLE's:

Centaur 10.1 3.0 0.0 3.7 v 991 X 1214
1 71004U 03336.53777889 .00000000 00000-0 00000-0 0 04
2 71004 63.4733 300.6384 0149592 188.4793 171.3703 13.43448178 09
NOSS leader 0.0 0.0 0.0 4.9 v 1007 X 1209
1 71001U 03336.53798225 .00000000 00000-0 00000-0 0 08
2 71001 63.4247 301.3282 0135067 185.2161 174.7465 13.42002823 01
NOSS trailer 0.0 0.0 0.0 4.9 v 1007 X 1210
1 71002U 03336.53799524 .00000000 00000-0 00000-0 0 02
2 71002 63.4241 301.3249 0135680 184.7387 175.2364 13.41930476 01