The UKIRT Hemisphere Survey (UHS) is an ongoing large-area near-infrared Northern Hemisphere survey conducted using the Wide Field Camera (WFCAM). Its primary objective is to provide contiguous coverage between declinations of 0° and +60° by combining new imaging with previous UKIDSS surveys including the LAS, GPS and GCS.

DR2 was focused on the K-band observations but also contained a small amount of remaining or reobserved J-band observations. Similarly, DR3 was focused on H-band observations and contains a small amount of new or reobserved K-band observations. After accounting for deprecated frames and undergoing quality control the DR2 merged catalogue contains ~513 million sources. The DR3 merged catalogue contains ~560 million sources. Below are coverage maps of detections per square degree in H and K-bands respectively. Areas previously covered by UKIDSS LAS, GPS and GCS are indicated on both.

You can see a current coverage chart in each band individually or altogether at this link: http://casu.ast.cam.ac.uk/wfcamsp/uhs