Differences

This shows you the differences between two versions of the page.

--- projects:storm [2015/01/02 12:15] – storm
+++ projects:storm [2015/03/10 20:45] (current) – storm
@@ Line 1: / Line 1: @@
 ====== STORM ======
-===== Stratospheric Observations and Radiation Monitoring =====
+** Stratospheric Observations and Radiation Monitoring**
 comments welcome: mrongen@halifax.rwth-aachen.de
@@ Line 6: / Line 6: @@
 {{ :projects:storm:badge.png?nolink&200 |}}
-==== Summary ====
+===== Summary =====
   * Still under development (T.B.D. = "to be done" or "to be determined"), no flight experience yet,...
   * 4 AA Batteries, Latex Balloon
   * 434.xxx Mhz, Shift xxx, xxx Baud
-  * Transmission every 30 second
+  * Transmission every xx seconds
-==== Payload ====
+===== Payload =====
   * Five main modules clustered around central battery pack
   * (mainly) I2C as communication protocol between modules
-  (System overview image)
+ {{ :projects:storm:overview.png?direct&300 |}}
-=== Power Distribution Board (PDB) ===
+==== Power Distribution Board (PDB) ====
   * Distributes 6V from 4 AA batteries to all modules
-  * Mounted to back of standart battery pack (Link)
+  * Mounted to back of standart battery pack
-  * Monitors battery voltage and total current via INA219 IC and 200mOhm shunt resistor (Link)
+  * Monitors battery voltage and total current via INA219 IC and 200mOhm shunt resistor
+    * Datasheet: [[http://www.ti.com/lit/ds/symlink/ina219.pdf|http://www.ti.com/lit/ds/symlink/ina219.pdf]]
   * Design Files: (Link)
-== Batteries ==
+=== Batteries ===
   * Energizer Ultimate Lithium
-    * Datasheet: (Link)
+    * Datasheet: [[http://data.energizer.com/PDFs/l91.pdf|http://data.energizer.com/PDFs/l91.pdf]]
-=== Flight Controle Unit (FCU) ===
+==== Flight Controle Unit (FCU) ====
-== MicroController and GPS ==
+=== MicroController and GPS ===
   * NavSpark Microcontroller (originalle an Indigogo Campaign)
+    * Datasheet: [[http://navspark.mybigcommerce.com/content/NavSpark-User-Guide_rev0.6.pdf|http://navspark.mybigcommerce.com/content/NavSpark-User-Guide_rev0.6.pdf]]
   * 100MHz 32bit LEON3 Sparc-V8
   * Full GPS support with external battery
@@ Line 43: / Line 45: @@
   * Software: (Link)
- (Photo)
+=== Inertial measurement unit (IMU) and Telemetrie Module ===
-== Inertial measurement unit (IMU) and Telemetrie Module ==
   * Integrated buck-converter power supply to 3.3V for itself and the uC
   * Design Files: (Link)
-**IMU**
+== IMU ==
   * BMP180: Temperature, Pressure and humidity sensor
-    * Datasheet: (LinK)
+    * Datasheet: [[https://www.adafruit.com/datasheets/BST-BMP180-DS000-09.pdf|https://www.adafruit.com/datasheets/BST-BMP180-DS000-09.pdf]]
   * LSM303D: 3 axis accelerometer und magnetometer
-    * Datasheet: (Link)
+    * Datasheet: [[http://www.st.com/st-web-ui/static/active/en/resource/technical/document/datasheet/DM00057547.pdf|http://www.st.com/st-web-ui/static/active/en/resource/technical/document/datasheet/DM00057547.pdf]]
   * L3GD20:  3 axis gyrometer
-    * Datasheet: (Link)
+    * Datasheet: [[http://www.st.com/st-web-ui/static/active/en/resource/technical/document/datasheet/DM00036465.pdf|http://www.st.com/st-web-ui/static/active/en/resource/technical/document/datasheet/DM00036465.pdf]]
-**Telemetrie**
+== Telemetrie ==
   * Radiometrix NTX2
-    * Datasheet: (Link)
+    * Datasheet: [[http://www.radiometrix.com/files/additional/ntx2nrx2.pdf|www.radiometrix.com/files/additional/ntx2nrx2.pdf]]
-  * T.B.D.: Quarter wave antenna with solid or wire ground
+  * Quarter wave antenna with four radials
+    * See [[projects:storm:antenna|tuning description]]
-**Storage**
+== Storage ==
   * not all data can be transmitted, but everything is stored for offline analyses
   * 1 GB micro SD-Card interfaced via SPI
- (Photo)
+{{ :projects:storm:bottom.jpg?direct&300 |}}
+{{ :projects:storm:top.jpg?direct&300 |}}
-== Sensor Fusion Board (SFB) ==
+=== Sensor Fusion Board (SFB) ===
   * distributes I2C to OTP, RD and PDB modules
   * UART to GSM module
   * +3V3 to OTP and PDB
+  * Design files: (Link)
-== Data packet structure and integration into the HabHub ==
+=== Data packet structure and integration into the HabHub ===
 T.B.D.
-=== Outside Temperature Probe (OTP) ===
+==== Outside Temperature Probe (OTP) ====
   * BMP85 on breakout board
-    * Datasheet: (Link)
+    * Datasheet: [[https://www.sparkfun.com/datasheets/Components/General/BST-BMP085-DS000-05.pdf|https://www.sparkfun.com/datasheets/Components/General/BST-BMP085-DS000-05.pdf]]
-=== GSM-Module ===
+==== GSM-Module ====
   * ElecFreak GSM Module
-    * Datasheet: (Link)
+    * Product page: [[http://www.elecfreaks.com/store/gprsgsm-moduleefcom-pro-efcompro-p-450.html|http://www.elecfreaks.com/store/gprsgsm-moduleefcom-pro-efcompro-p-450.html]]
   * integrated LDO power supply
   * only powered up after landing, so to conserve battery and as the RD is EMI sensitive
   * sends SMS with position, altitude, speed (hopefully zero) every X minutes
-=== Radiation detector (RD) ===
+==== Radiation detector (RD) ====
-== Theory ==
+=== Theory ===
-== Options ==
+for more information see for example: "Ionizing Radiation in Earth’s Atmosphere and in Space Near Earth / DOT/FAA/AM-11/9"
+At earths surface about half of the natural ionising radiation originates from radioactive isotopes in the ground. The other half is a result of charged particles hitting the earths atmosphere (so called cosmic rays).
+As cosmics rays interact with nuclei in the atmosphere extensive air showers with hunderts of secondary particles are created (search for Heitler model to get a rough idea), which subsequently decay as they propagate towards the surface.
+Going up in the atmosphere the dose rate increases, as more and more secondary particles are present. At a height of around 20 kms, at the so called Pfotzer maximum, the combined dose rate of primary and secondary particles reaches its maximum. Above that height the amount of ionising radiation decreases again.
+=== Detection Options ===
   * PMT (Photomultipler) with Scintillator:
@@ Line 132: / Line 141: @@
     * - EMI sensitive
-== Teviso RD3024 Module ==
+=== Teviso RD3024 Module ===
   * array of radiation soft PIN diodes
@@ Line 140: / Line 149: @@
   * SMD package
   * Teviso sponsored one unit, otherwise ~120€
+    * Datasheet: [[http://www.teviso.com/file/pdf/RD3024_DataSpecification.pdf|http://www.teviso.com/file/pdf/RD3024_DataSpecification.pdf]]
-== Breadboard test ==
+=== Breadboard test ===
   * ATTiny85 triggers on rising and falling edges of RD3024 TTL pulse
@@ Line 148: / Line 158: @@
   * ATTiny acts as I2C slave against FCU
- (Photo and plots)
+{{ :projects:storm:breadboard.jpg?direct&300 |}}
+{{ :projects:storm:resolution.png?direct&300 |}}
-== Flight module ==
+=== Flight module ===
    * Integrates buck-converter power supply to 3.3V
@@ Line 156: / Line 167: @@
    * Design Files: (Link)
-=== Camera ===
+==== Camera ====
-  * FlyCamOne Eco V2 (Link)
+  * FlyCamOne Eco V2
   * integrated power supply
   * Video, Timed Pictures
@@ Line 165: / Line 176: @@
   * 4-6 V input
-=== Conformal coating ===
+==== Conformal coating ====
   * breakdown voltage of air is drastically reduced at low pressures (Paschen Law)
   * can lead to elevated discharge rates even at voltages below sparking
   * coat PCBs and plugged connectors with Plastik70
+    * Datasheet: [[http://www.uni-kl.de/elektronik-lager/498105|http://www.uni-kl.de/elektronik-lager/498105]]
-=== Environmental testing ===
+==== Environmental testing ====
-== Vaccum ==
+=== Vaccum ===
   * T.B.D.: Test full electronics system with conformal coating for elevated discharge at Paschen minimum.
-== Temperature ==
+=== Temperature ===
   * T.B.D.: Battery temperature is not supposed to drop below -10°C when exposing powered payload to -50°C for 20 minutes
-== EMI ==
+=== EMI ===
   * T.B.D.: Test GPS reception and RD noise during 70cm and GSM transmissions
-== Telemetries range ==
+=== Telemetries range ===
-  * Possibly a test chasing a commercial hot air ballon with the payload
+  * Possibly a test chasing a commercial hot air ballon with the payload on board
-== Boyancy ==
+=== Boyancy ===
   * Should stay afloat on standing water for at least 10 minutes
-=== Mechanical integration and isolation ===
+==== Mechanical integration and isolation ====
 T.B.D.
-==== Ballon and Parachute ====
+===== Balloon and Parachute =====
-T.B.D.
+  * Balloon: Totex TA-1000
+  * Parachute: Spherachute Balloon Parachute  - 54in
-==== Radar reflector ====
+both from www.randomengineering.co.uk
-T.B.D.
+===== Radar reflector =====
+mm wide, build from Balsa wood, coated with aluminium tape
+weighs in at around 250g, so a little on the heavy side
+{{ :projects:radar_reflector.jpg?direct&300 |}}
-==== Chase car ====
+===== Chase car =====
   * Diamond MR-77S Mag Antenna
   * Custom QFH antenna - T.B.D.
-  * FunCube Dongle (Link)
+  * HABAmp 434MHz/70cm http://ava.upuaut.net/store/index.php?route=product/product&product_id=83
-  * DVB-T Dongle (Link)
+  * FunCube Dongle
+  * DVB-T Dongle
-==== Red Tape ====
+===== Red Tape =====
   * in Germany I need a Flugverkehrskontrollfreigabe (liftoff permission) from the Deutsche Flugsicherung (German airspace control)
   * 2 weeks lead time
-  * this includes the need for a 1 day aviation insurance (~60€)
+  * this includes the need for a 1 day aviation insurance (~60€))