The central source is 1´´ wide, and is resolved by all the subcollimators, both fine and coarse, but the upper source is 10´´ wide and is over resolved by subcollimators 1,2,3 and 4, so they produce no modulation and do not contribute to the map.
| SUBCOLLIMATOR | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
| ANGULAR RESOLUTION | 2.3´´ | 3.9´´ | 6.8´´ | 12´´ | 20´´ | 36´´ | 60´´ | 108´´ | 180´´ |