OPS-28 is a

Pulse-Doppler radar A pulse-Doppler radar is a radar system that determines the range to a target using pulse-timing techniques, and uses the Doppler effect of the returned signal to determine the target object's velocity. It combines the features of pulse radars an ...

manufactured by Japan Radio. It is installed as a low-altitude warning / anti-water search radar mainly on the

Maritime Self-Defense Force , abbreviated , also simply known as the Japanese Navy, is the maritime warfare branch of the Japan Self-Defense Forces, tasked with the naval defense of Japan. The JMSDF was formed following the dissolution of the Imperial Japanese Navy (IJN) ...

's escort ship. Variations include OPS-28-1, OPS-28B, OPS-28C, OPS-28D, OPS-28E and OPS-28F. The model numbers of the Maritime Self-Defense Force's electronic devices, including this machine, are generally based on the naming rules for military electronic devices of the U.S. military. It is for radar mounted on surface vessels, for detection / distance direction measurement / search.

Overview

traveling wave tube A traveling-wave tube (TWT, pronounced "twit") or traveling-wave tube amplifier (TWTA, pronounced "tweeta") is a specialized vacuum tube that is used in electronics to amplify radio frequency (RF) signals in the microwave range. The TWT belongs t ...

(TWT) and a crossed power amplifier tube (CFA) are used as radar transmitters, and when used for normal voyages, they are switched to another transmitter using a magnetron. The operating frequency is C Band, and pulse compression technology has been introduced. It has been continuously improved, and there are multiple models of OPS-28B, OPS-28C, and OPS-28D depending on the mounting method of the IFF antenna. It began to be installed on the JS Shirane, which was commissioned in 1980.{{Cite book, last=Nagai, first=Arahito, title=Current Ship-based Radar of the Maritime Self-Defense Force, Ships of the World, publisher=Gaijinsha, date=March 1991, volume=433, location=Japan, pages=84–89 It can be used not only for surface targets but also for detecting low-flying anti-ship missiles ( sea skimmers) as a low-altitude warning radar, and is said to be similar to the US Navy's TAS Mk.23. Conventional anti-water radar has almost doubled the detection distance from the front to the sea skimmer, which was about the line of sight of radio waves. In addition, the OPS-28-1 installed on the

JS Ishikari JS ''Ishikari'' (DE-226) was the first destroyer escort with a gas turbine engine and surface-to-surface missiles of the Japanese Maritime Self-Defense Force. She is the successor of the earlier . Entering service in 1981, she remained active unti ...

and Yūbari-class destroyer escort has been given more full-scale anti-aircraft alert capability by changing the beam pattern. However, with this aircraft, the emphasis on precision search at long distances reduces the search capability at short distances, and in order to compensate for this, OPS-19 /

OPS-20 OPS-20 is a two-dimensional radar manufactured by Japan Radio. It is compatible with the Global Maritime Distress and Safety System (GMDSS) and installed as an anti-water search radar on the Maritime Self-Defense Force's escort ship. Variations in ...

radar may also be installed on ships equipped with this aircraft.

Onboard ships

Shirane-class destroyer The ''Shirane''-class destroyers were a pair of Japanese destroyers originally built during the late 1970s. They are built around a large central hangar which houses up to three helicopters and they are the natural successor of the s. Design T ...

Haruna-class destroyer The ''Haruna''-class destroyer was a destroyer class built for the Japan Maritime Self-Defense Force (JMSDF) in the early 1970s. These helicopter carrying destroyers (DDH) are built around a large central hangar which houses up to three helicopters ...

Izumo-class helicopter destroyer The or 22DDH are aircraft carriers (originally helicopter carriers) in service with the Japan Maritime Self-Defense Force (JMSDF). The class is designated as a multi-purpose operation destroyer by the Japanese government due to limits on th ...

Kongō-class destroyer The of guided-missile destroyers in the Japan Maritime Self-Defense Force are equipped with the Aegis Combat System, and is the first of few ship classes outside the United States to have that capability. Following a decision made in December 200 ...

Atago-class destroyer The in the Japan Maritime Self-Defense Force is a modified version of the equipped with the Aegis Combat System. Background The Maritime Self-Defense Force (MSDF) began construction of the Aegis-equipped in FY1988 as the core ship for air de ...

Hatsuyuki-class destroyer The is a class of destroyer, serving with the Japan Maritime Self-Defense Force (JMSDF). It was the first class of first generation of general-purpose destroyers of the JMSDF. Background Destroyers of the JMSDF had been divided into two series, ...

Asagiri-class destroyer The is a class of destroyer, serving with the Japan Maritime Self-Defense Force (JMSDF). It was the second class of first-generation general-purpose destroyers of the JMSDF. Background The JMSDF started construction of a since FY1977. This was ...

* Murasame-class destroyer *

Takanami-class destroyer The is a class of destroyer serving with the Japan Maritime Self-Defense Force (JMSDF). This warship is the slightly modified class of second-generation, general-purpose destroyers of the JMSDF. Background Since FY1991, the JMSDF started cons ...

* Yūbari-class destroyer escort *

Abukuma-class destroyer escort The ''Abukuma''-class destroyer escort (or frigate) is the general-purpose destroyer escort of the Japan Maritime Self-Defense Force. It is the successor of the earlier . Design This class was planned to replace the earlier and possess both ...

Ōsumi-class tank landing ship The ''Ōsumi'' class (), is a Japanese amphibious transport dock. The class is also known as the ''Oosumi'' class. While the Japan Maritime Self-Defense Force (JMSDF) describes the ''Ōsumi'' class as tank landing ships (LSTs), they lack the bow ...

Towada-class replenishment ship The ''Towada'' class is a series of replenishment oilers of the Japan Maritime Self-Defense Force. Three ships of the class were built between 1985 and 1989. The ships have the hull designator AOE. The ''Towada'' class was designed as an enla ...

Mashū-class replenishment ship The ''Mashū'' class is a series of replenishment oilers of the Japan Maritime Self-Defense Force. They were built from 2002 to 2004. The ships have the hull designator AOE. The ''Mashū'' class was designed as an enlarged, improved version of ...

Gallery

File:ORN-6 TACAN and OPS-28B,OPS-20 on board JS Hatakaze(DDG-171) at Port of Sakaisenboku 20141019.JPG, OPS-28B aboard JS Hatakaze File:JS Asagiri（DD-151） OPS-28C＆OPS-20 in Tenpouzan Port 140323.JPG, OPS-28C aboard

JS Asagiri JS ''Asagiri'' (DD-151) is an of the Japan Maritime Self-Defense Force. Development and design The ''Asagiri'' class is equipped for combat and interception missions, and is primarily armed with anti-ship weapons. They carries two of the Mk-1 ...

File:Foremast of DD-109 (with captions).jpg, OPS-28D aboard JS Ariake File:Mast of JS Atago(DDG-177) Radars.jpg, OPS-28E aboard JS Ataga File:OPS-28F radar on board mast of JS Kaga(DDH-184) at Port of Kanazawa July 15, 2017.jpg, OPS-28F aboard

JS Kaga JS ''Kaga'' (DDH-184) is a helicopter carrier being converted into an aircraft carrier beginning in March, 2022. Officially classified as a multi-purpose operation destroyer, she is the second ship in the of the Japan Maritime Self-Defense For ...

Citations

References

Norman Friedman Norman Friedman (born 1946) is an American internationally known author and analyst, strategist, and historian. He has written over 30 books and numerous articles on naval and other military matters, has worked for the U.S. Navy and Marine Corps ...

(2006).
The Naval Institute Guide to World Naval Weapon Systems
'.

Naval Institute Press The United States Naval Institute (USNI) is a private non-profit military association that offers independent, nonpartisan forums for debate of national security issues. In addition to publishing magazines and books, the Naval Institute holds se ...

ISBN The International Standard Book Number (ISBN) is a numeric commercial book identifier that is intended to be unique. Publishers purchase ISBNs from an affiliate of the International ISBN Agency. An ISBN is assigned to each separate edition and ...

9781557502629 * ''Self-Defense Force Equipment Yearbook 2006-2007''. Asaun News Agency. ISBN 4-7509-1027-9 Naval radars Military radars of Japan Military equipment introduced in the 1980s