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Make a Mock Milky Way Survey

Model
km/s/kpc
RCGs per M⊙
109M⊙
Geometry
deg
deg
deg2
For small areas set to 1 to produce a representative sample of stars.For large areas and deep surveys set this to a small number togenerate a random subsample reduced by this factor.
Photometry
Your mock survey must have a maximum depth in a band you choose from your primary photometric system. To this you can add colour cuts and cuts in absolute magnitude. This allows you to focus your survey, for example, on giants or horizontal branch stars. All other survey selection functions (e.g. on parallax/proper motion) must be applied manually post catalogue generation.
This system contains the bands
REQUIRED Note: the magnitude must exist in your primary photometric system
REQUIRED. This should usually be the depth of your survey
e.g. J-Ks Note: both magnitudes must exist in your primary photometric system
Output Settings
Add columns with parallax and proper motions (in galactic coordinates)
Add columns with simulated Gaia DR2 astrometric errors. Scaled using the mission length.
months
DR2 is 22 months of data, DR3 will be 34 months, the nominal mission is 60 months.
This will add magnitude columns additional to your primary photometric system. Control clock to select multiple systems.
Miscellaneous
If empty the random number generators seed is chosen based on the time. If reproducibility is important for you then set the value here.
kpc
Note that without logging in you are limited to very small surveys, less than 20Mb in size. To increase this to 10Gb, you can log in or sign up in the top right corner of the page.