The SCANTER 4100 has gained international recognition due to its ability to detect and track small targets in all weather condition. Small 2 m2 targets can be detected out to 40nm and up to at least 10k ft. Two different antennea for Scanter 4000, one 15ft slow rotation for air search or a 21ft fast rotation for surface/sea skimmer detection

http://books.google.nl/books?id=4S3h8j_NEmkC&pg=PA225&lpg=PA225&dq=%22Terma+Scanter+4100+I-band+surveillance+radar%22&source=bl&ots=hIXqKU-3a-&sig=stoQ9aeuh4nSWo9_kZIj7Ozd0gc&hl=nl&sa=X&ei=wwYUUe-AMdG7hAejoYHIAg&ved=0CDQQ6AEwAQ#v=onepage&q=%22Terma%20Scanter%204100%20I-band%20surveillance%20radar%22&f=false