  We begin the study of characterizations of recently defined approximate
Schauder frame (ASF) and its duals for separable Banach spaces. We show that,
under some conditions, both ASF and its dual frames can be characterized for
Banach spaces. We also give an operator-theoretic characterization for
similarity of ASFs. Our results encode the results of Holub, Li, Balan, Han,
and Larson. We also address orthogonality of ASFs.
