Radar

**Radar** is a detection system that uses radio waves to determine the range, angle, or velocity of objects. The acronym was coined in the 1940s to stand for **RA**dio **D**etection **A**nd **R**anging.

## Overall Description

A radar system consists of a transmitter producing electromagnetic waves in the radio or microwaves domain, a transmitting antenna, a receiving antenna (often the same antenna is used for transmitting and receiving) and a receiver and processor to determine properties of the objects. Radio waves (pulsed or continuous) from the transmitter reflect off the object and return to the receiver, giving information about the object's location and speed. Both Japan and the Gra Valkas Empire make use of this process to detect incoming threats such as aircraft, ships and even missiles. However, Japan's radar systems are far more advanced than the Gra Valkas' WW2-era systems and have greater range and applications.

Mu has also developed their own radar systems using knowledge from Japanese books and outdated computer equipment.

### Countermeasures

* Stealth Technology
* Electronic Warfare: jamming/fool to reduces the radar's accuracy

## Service History

### Japan

Japan has made use of their radar systems to detect incoming threats such as wyverns and aircraft, as well as use it to map unknown regions of the New World. It is also very useful to fire missiles and projectiles from Beyond Visual Range, (BVR). And unlike the Anti-Aircraft Vibration Detector used by other nations, radar will detect objects regardless of whether it has magic or not. After the transfer to the New World, Japan adjust the radar so the unknown objects can be immediately identified with custom callsign such as WVN on Wyverns. However, despite the adjustment, Japan have yet to fully adjusted for IFF (Identification Friend or Foe) tags in the New World due to Pal Chimera has yet to be identified as part of the friendly unit, concerned that JSDF may shot down Pal Chimera by accident should it appear on Japan's radar. Due to this deficiency, Japan warns all nations it is allied with, to stay clear of airways and sea lanes near their forces, in order to avoid friendly fire. During the Japanese-Parpaldian War, Japan warned the Topa Kingdom not to enter the airspace or sea lanes near the coastline as they would be using BVR missiles to take out Parpaldian air and naval forces.

E-767 and E-2C Hawkeye AEW are equipped with radar that can detect enemy units up to 1,000 km, often used as a reconnaissance and coordinates with JSDF to launch an appropriate number to intercept. Additionally, Japan E-767 owns a Pulse-Doppler radar, known as AN/APY-2, and able to separate maritime and airborne targets from the ground and sea clutter, rendering NOE (Nap On Earth) tactics ineffective.

### Gra Valkas Empire

The Gra Valkas Empire has also made use of radar, but their systems are far more primitive than Japan's, due to their reliance on vacuum tube technology. As a result, their radar systems can easily be jammed and only works between the 10 o'clock to 2 o'clock positions when resetting into full power before being jammed again. Gra Valkas Radar is only available on large surface ships and land stations, and cannot be made smaller to fit on aircraft or vehicles. It has a range of around 200km.

### Annonrial Empire

The Annonrial Empire is also confirmed to have radar and it is called Conductive Magnetic Radar. Basically it uses the same principle as that of a mechanical-based radar, only that it is powered by magical energy. It is based on the radar used by the Ravernal Empire. Several radar towers are installed in the Annonrial mainland, Branchel Continent and even in its window island, Bushpaka Latan.

### Holy Mirishial Empire

The HME is also a user of magical radar. Initially, HME only uses the Magic Detection Radar as their primary means of enemy detection. It is a fixture on several of its more modern ships. However, it has difficultly in detecting non-magical contacts. They have a powerful magical radar from the Ravernal Empire, but it is only equipped in the Pal Chimera's Atrates Cannon. They have difficulty in developing their magical radar in their ships

However, with the arrival of Japan and Gra Valkas, the HME was surprised that both transferred nations uses a technology seen from the Ravernal Empire. By aligning itself with Japan, the empire managed to speed up its research and development, example is its research in guided munitions and radar. The Orichalcum-Class Magic Battleships is the first Milishial warship that has radar installed for its primary detection. Not only that, HME has managed to put radar in one of their reconnaissance plane, the Alpha-1, and had the data gathered by the recon plane to be send to the *Cosmos,* citing that HME had already develop data link in their military machines.

### Mu

Mu developed its own 2d radar using references form Japanese books with a range of at least 200 km. By manipulating its tilt, they manage to create a rudimentary 3d radar to measure altitudes of incoming aircraft. The computers used by Mu are old-version personal computers from Japan.