Four back-thinned full-frame transfer CCD line sensors designed for time delay integration (TDI) have been introduced by Hamamatsu Corp. The S10200-02 (1024 channels, two ports), S10201-04 (2048 channels, four ports), S10202-08 (4096 channels, eight ports) and S10202-16 (4096 channels, 16 ports) each feature 128 vertical stages, producing ∼128 times greater signal strength than that offered by conventional non-TDI line sensors. Multiple output ports yield a high-speed line rate of ≥50 kHz. Vertical charge transfer is bidirectional so that image acquisition can be performed in either direction. Spectral response is from 200 to 1100 nm.