Contents  
1 Introduction  
2 Sky Model  
2.1 Known sources  
2.2 Synthetic source populations  
2.3 Interstellar emission  
3 Observation plans  
3.1 Instrument description, simulation strategy, and software  
3.2 Pointing pattern  
3.3 Observation scheduling  
3.4 Observation simulation  
4 Source catalogues  
4.1 Analysis outline  
4.2 Diagnostics and results  
5 Population studies: PWNe and SNRs  
6 Dedicated analyses of other source classes  
6.1 Gamma-ray binaries  
6.2 Pulsars  
6.3 PeVatrons  
7 Diffuse emission  
7.1 Unresolved sources  
7.2 Interstellar emission  
8 Summary and perspectives