Variable definitions Chart 9 Variable Definition Units DR Data rate Bits/second SW Swath width Meters Across track pixel Meters dimension Vn Ground track velocity Meters/second Along track pixel Meters dimension Bits/pixel BitsVariable Definitions Chart 9 Variable Definition Units DR Data Rate Bits/second SW Swath Width Meters X Across track pixel dimension Meters Vn Ground track velocity Meters/second Y Along track pixel dimension Meters b Bits/pixel Bits