1. INTRODUCTION

2. CONSTRUCTING THE EXTENDED SDSS PSFS
2.1 Constructing the outer part of the PSFs
2.2 Constructing the intermediate part of the PSFs
2.3 Constructing the central part of the PSFs
2.4 PSF junction (central-intermediate-outer parts)
2.5 Final refinements to the extended PSFs

3. RESULTS
3.1 PSFs characteristics
3.2 Scattered light subtraction

4. DISCUSSION AND CONCLUSIONS
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