Difference between revisions of "Grand Slam Passive Seismometer"

From Kerbal Space Program Wiki
Jump to: navigation, search
(science ratio formula)
(Explain how the amount of science for the seismometer/seismic sensor is calculated.)
Line 9: Line 9:
 
This is the only deployable science module which doesn't send science points through time. Instead, it works by impacting objects near the seismometer.
 
This is the only deployable science module which doesn't send science points through time. Instead, it works by impacting objects near the seismometer.
  
−
== Scientist bonus/malus ==
 
  
−
The science points multiplier formula is as follows: base value of the module (1) · kerbal level multiplier · [[Science#Celestial_body_multipliers|body surface science multiplier]]
 
  
−
The table for the kerbal multiplier value is the following:
+
== Science value calculation ==
 +
The fraction of the Seismic Sensor's amount of science that is achieved by an impact is computed as Sensor Readings · Distance Attenuation · Setup.
 +
 
 +
(The seismometer's context menu entry "Science Completed" shows this values summed up.)
 +
 
 +
The amount of science points generated by an impact is the above fraction times the experiment's total value (80 Points) times the [[Science#Celestial_body_multipliers|celestial body surface science multiplier]].
 +
 
 +
For example, an impact with a sensor reading of 40%, an attenuation value of 65% and a setup value of 80% achieves a fraction of 0.4 · 0.65 · 0.8 = 0.208 i.e. 20.8% of the Seismic Sensor's total experiment value.
 +
If this impact happened on Moho (whose surface science multiplicator is 10), the amount of science generated by this impact will be 0.208 · 80 · 10 = 166.4 science points.
 +
It would take 5 such impacts to generate the full amount of science that the Seismic Sensor can generate.
 +
 
 +
 
 +
=== Sensor Readings ===
 +
 
 +
The "Sensors Readings" value is the kinetic energy of the impactor divided by an energy value specific to the celestial body.
 +
The kinetic energy is calculated as follows:
 +
<math> \text{Energy} = 0.5 \times \text{Mass} \times \text{Speed} ^  2 </math>
 +
where the mass is in kg, the speed in m/s, and the energy in Joule.
 +
 
 +
The table for the celestial body value is the following:
 +
 
 +
{| class="wikitable"
 +
|-
 +
!Body
 +
!Value
 +
|-
 +
|Moho
 +
|2.02e9J
 +
|-
 +
|Eve
 +
|9.78e10J
 +
|-
 +
|Gilly
 +
|1e6J
 +
|-
 +
|Kerbin
 +
|4.184e10J
 +
|-
 +
|Mun
 +
|7.82e8J
 +
|-
 +
|Minmus
 +
|2.12e7J
 +
|-
 +
|Duna
 +
|3.62e9J
 +
|-
 +
|Ike
 +
|2.23e8J
 +
|-
 +
|Dres
 +
|2.58e8J
 +
|-
 +
|Laythe
 +
|2.36e10J
 +
|-
 +
|Vall
 +
|2.49e9J
 +
|-
 +
|Tylo
 +
|3.39e10J
 +
|-
 +
|Bop
 +
|2.99e7J
 +
|-
 +
|Pol
 +
|8.66e6J
 +
|-
 +
|Eeloo
 +
|8.94e8J
 +
|}
 +
 
 +
 
 +
For example a 4.5t impactor hitting at 1000m/s has an energy of 0.5 · 4500kg · 1000m/s ^ 2 = 2.25e9J .
 +
On Moho this gives a sensor reading of 2.25e9J / 2.02e9J = 1.11 i.e. 111%.
 +
 
 +
 
 +
=== Distance Attenuation ===
 +
 
 +
The attenuation value depends on the distance of the impact point from the seismometer. It starts at 0% for a distance of zero meters, rises sharply to a maximum of 100% at a distance of 0.02 times the radius of the celestial body and then declines (slowlier) with further increasing distance.
 +
Erring towards a greater distance will result in a smaller decrease of the attenuation value than erring the same amount towards a smaller distance.
 +
For example on Moho with a radius of 250km the optimal distance is 0.02 · 250km = 5km, but a distance of 7km will also still result in an attenuation value of 100%.
 +
 
 +
 
 +
 
 +
=== Setup (Scientist bonus/malus) ===
 +
 
 +
The Setup value (which is the same as the "Science Rate" in the seismometer's context menu) depends on scientist level of the kerbal that deployed the seismometer, as given by this table:
  
 
{| class="wikitable"
 
{| class="wikitable"
Line 42: Line 127:
 
|}
 
|}
  
−
For example a level 3 scientist deploying a seismometer experiment on Mun gives 1 · 0.60 · 4 = 2.4 science points multiplier
+
This multiplier influences how much science is generated by each impact but not the total amount of science that the experiment can generate.
 +
 
 +
The total amount of science is as follows: base value of the module (80)  · [[Science#Celestial_body_multipliers|body surface science multiplier]]
 +
 
  
 
== Changes ==
 
== Changes ==

Revision as of 19:48, 14 April 2024

This article is a stub. You can help KSP Wiki by expanding it.
Grand Slam Passive Seismometer
Part image
Environmental sensor by
Probodobodyne Inc
Cost (total) 4 000.00 Funds
Mass (total) 0.035 t
Drag 0.1
Max. Temp. 1200 K
Impact Tolerance 5 m/s
Research Electronics.png Electronics
Unlock cost 12 000 Funds
Since version 1.7.1
Part configuration seismicSensor.cfg
Experiment Surface Deployed Seismic Sensor
Packed volume 25 l
Power required 1 unit

Product description

“ This ground-deployed sensor contains very delicate, sophisticated accelerometers meant to detect and analyze the precisely calibrated seismic shock waves generated by smashing rocket parts at high speed into whatever planet or moon it happens to be sitting on.

Note: Please allow trained Scientists to deploy for best results. Needs a deployed power unit & central station to operate.

— Probodobodyne Inc

 ”

Usage

This is the only deployable science module which doesn't send science points through time. Instead, it works by impacting objects near the seismometer.


Science value calculation

The fraction of the Seismic Sensor's amount of science that is achieved by an impact is computed as Sensor Readings · Distance Attenuation · Setup.

(The seismometer's context menu entry "Science Completed" shows this values summed up.)

The amount of science points generated by an impact is the above fraction times the experiment's total value (80 Points) times the celestial body surface science multiplier.

For example, an impact with a sensor reading of 40%, an attenuation value of 65% and a setup value of 80% achieves a fraction of 0.4 · 0.65 · 0.8 = 0.208 i.e. 20.8% of the Seismic Sensor's total experiment value. If this impact happened on Moho (whose surface science multiplicator is 10), the amount of science generated by this impact will be 0.208 · 80 · 10 = 166.4 science points. It would take 5 such impacts to generate the full amount of science that the Seismic Sensor can generate.


Sensor Readings

The "Sensors Readings" value is the kinetic energy of the impactor divided by an energy value specific to the celestial body. The kinetic energy is calculated as follows: where the mass is in kg, the speed in m/s, and the energy in Joule.

The table for the celestial body value is the following:

Body Value
Moho 2.02e9J
Eve 9.78e10J
Gilly 1e6J
Kerbin 4.184e10J
Mun 7.82e8J
Minmus 2.12e7J
Duna 3.62e9J
Ike 2.23e8J
Dres 2.58e8J
Laythe 2.36e10J
Vall 2.49e9J
Tylo 3.39e10J
Bop 2.99e7J
Pol 8.66e6J
Eeloo 8.94e8J


For example a 4.5t impactor hitting at 1000m/s has an energy of 0.5 · 4500kg · 1000m/s ^ 2 = 2.25e9J . On Moho this gives a sensor reading of 2.25e9J / 2.02e9J = 1.11 i.e. 111%.


Distance Attenuation

The attenuation value depends on the distance of the impact point from the seismometer. It starts at 0% for a distance of zero meters, rises sharply to a maximum of 100% at a distance of 0.02 times the radius of the celestial body and then declines (slowlier) with further increasing distance. Erring towards a greater distance will result in a smaller decrease of the attenuation value than erring the same amount towards a smaller distance. For example on Moho with a radius of 250km the optimal distance is 0.02 · 250km = 5km, but a distance of 7km will also still result in an attenuation value of 100%.


Setup (Scientist bonus/malus)

The Setup value (which is the same as the "Science Rate" in the seismometer's context menu) depends on scientist level of the kerbal that deployed the seismometer, as given by this table:

Level Value
Not scientist 0.05
Level 0 0.25
Level 1 0.35
Level 2 0.45
Level 3 0.60
Level 4 0.80
Level 5 1.00

This multiplier influences how much science is generated by each impact but not the total amount of science that the experiment can generate.

The total amount of science is as follows: base value of the module (80) · body surface science multiplier


Changes

1.7.1
  • Initial Release
Structural
Grip pads
Grip strips
Robotics
Rotors
Hinges
Controllers
Servos
Turboshaft engines
Aerodynamic
Nose cones
Helicopter blades
Propeller blades
Fan blades
Fan shrouds
Science
Cargo
Antennae
Sensors
Control Stations
Generators
Retrieved from "https://wiki.kerbalspaceprogram.com/index.php?title=Grand_Slam_Passive_Seismometer&oldid=106555"