EM Detection Sensors

EM Detection Sensors

EM Detection Sensors passively detect shields and active search sensors of other ships, as well as electronic emissions from inhabited planets.

Components

EM Sensor Sensitivity

EM Sensor Sensitivity is a technology found under Sensors and Fire Control. Each level of the technology increases the range at which the sensor can detect a target. More sensitive sensors are more expensive and require more raw materials.

Level	Cost	Materials Required
5	5	1.25x Duranium 3.75x Uridium
6	6	1.5x Duranium 4.5x Uridium
8	8	2x Duranium 6x Uridium
11	11	2.75x Duranium 8.25x Uridium
14	14	3.5x Duranium 10.5x Uridium
18	18	5.5x Duranium 13.5x Uridium
24	24	7x Duranium 18x Uridium
32	32	9x Duranium 24x Uridium
40	40	11x Duranium 30x Uridium
50	50	13.5x Duranium 37.5x Uridium
60	60	16x Duranium 45x Uridium
75	75	19.75x Duranium 56.25x Uridium

Total Sensor Size

Total Sensor Size is not based on any technology; all options are available from the beginning. Available sizes run from 0.1 HS to 50 HS. Increments of 0.1 HS are available for sensors from 0.1 to 1 HS; sizes from 1 HS to 50 HS are available in 1 HS increments. The following attributes are affected by sensor size:

Overall Sensitivity

EM Sensor Sensitivity is multiplied by Total Sensor Size to determine the overall sensitivity of the sensor. The overall sensitivity is the range, in millions of kilometers, at which the sensor can detect a target of signal strength 1000. For example, a sensor with EM Sensor Sensitivity 8 that takes up 3 HS can detect a strength 1000 target at 24,000,000 km (8 * 3 = 24).

HTK

HTK is 0 for sensors smaller than 1 HS, and 1 for sensors 1 HS or larger.

Crew

Base crew size is 5. This is multiplied by sensor size, and fractions are truncated (so 0.1 HS sensors require no crew).

Cost

Cost from the EM Sensor Sensitivity chart is multiplied by Total Sensor Size, and fractions are rounded to the nearest whole number. Half is rounded to the nearest even whole number; for example, both 3.5 and 4.5 are rounded to 4.

Materials Required

Materials required from the EM Sensor Sensitivity chart are multiplied by Total Sensor Size, and fractions are rounded to the nearest 0.25. Half is rounded to the nearest even 0.25, so 1.125 (9/8) and 0.875 (7/8) are both rounded to 1 (8/8).

Hardening

Hardening is based on Electronic Hardening technology, found under Sensors and Fire Control. Each level of the technology reduces the chance that a microwave weapon will destroy the sensor if it is hit. Greater levels of hardening cost more and require more raw materials, but they do not effect sensor size, crew required, or sensitivity.