My ex-husband has been awarded his pension benefit, so can this be considered income for determining spousal support?

What you are describing runs into the problem of "double dipping." That is, treating an asset as property and as an income stream. Some states say that if a pension is awarded to one spouse as part of a property settlement, it cannot be used in calculating spousal support as an income stream. Other states, on the other hand, say that it can be; you can double dip. Each state has different rules regarding this issue and it is best to consult a lawyer in your area. If double dipping is permitted in your state, it often becomes a negotiating tool, because there can be various financial repercussions depending upon how the pension is divided and what is awarded as spousal support.