Observational Data Summary Table
| per Night | per Run | per Year | per Survey | whole Project | ||||
| Opt.1 | Opt.2 | Opt.3 | ||||||
| Obs. Data | Total | 320 Gb | 5 Tb | 15 Tb | 52 Tb | 70.5 Tb | 43 Tb | 200 Tb |
| Science | 144 Gb | 1.5 Tb | 4.4 Tb | 16 Tb | 20.5 Tb | 13 Tb | 55 Tb | |
| Image Nb. | Total | 220 | 3300 | 10000 | 36300 | 48900 | 29700 | 150000 |
| Science | 100 | 1000 | 3000 | 11000 | 14000 | 9000 | 40000 | |
| Night Nb. | total | - | 16 | 48 | 240 | 290 | 180 | 900 |
| science | - | 10 | 30 | 150 | 180 | 111 | 550 | |
| Run Nb. | - | 3 | 15 | 18 | 11 | 20 | ||
| Year Nb. | - | 5 | 6 | 4 | 6/15 ? | |||
Image Size and Numbers
Image size : 1.44 Gb (Gigabyte)
Image quantity : one image takes approximately 4-5mn (6mn for mean time of telescope per exposure over the 5 bands, at least 3mn exposure + 20 s readout + offset/pointing) => 100 scientific images in 8 hours. 
per year. It is assumed that 3 runs per year will be devoted to a survey => 10 000 images. per survey (for 5 colors) :
- option 1 : shallow : limiting magnitude (point source) = 24. : Area = 1000 square degree => 36 300
- option 2 : deep : limiting magnitude (point source) = 25.5 : Area = 100 square degree => 49 000
- option 3 : very deep : limiting magnitude (point source) = 27. : Area = 4 square degree => 30 000
whole project : 150 000 (3 surveys + pointed mode which will produce as much data as one survey). Must be completed in approx. 5 years.
Object Numbers and >Database Size
Each square degree, corresponding to one camera field, will generate for each type of survey, at least the following amount of data in the database : shallow : limiting magnitude (point source) = 24. => 600 Mbytes deep : limiting magnitude (point source) = 25.5 => 2 Gbytes very deep : limiting magnitude (point source) = 27. => 11 Gbytes
Then, the whole DB size for the considered survey areas covered, will reach 1 Terabyte !
