SPACI score report for 3s1d in ASTRAL 2.04:

PDB Entry: 3s1d
SPACI score: 0.5
AEROSPACI score: 0.5

Experiment type: XRAY
Resolution: 1.75
R-factor: 0.216
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 1
PCK3 PROCHECK H-bonds: 2
WCK1 WHAT_CHECK Packing: -1.157
WCK2 WHAT_CHECK Ramachandran: -1.569
WCK3 WHAT_CHECK Chi angles: -0.926
WCK4 WHAT_CHECK Backbone: 2.966

Note: Here are links to pages about PROCHECK and WHAT_CHECK.

Here is the full WHAT_CHECK report on this protein (linked from the WHAT_CHECK site).