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en:abl [2013/10/25 22:47]
kaklik [__Aviation maps__]
en:abl [2017/01/05 19:53] (current)
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   ​   ​
 ===== Ground discharge box ===== ===== Ground discharge box =====
 +
 +{{ :​cs:​designs:​meteo:​abl01a_ground_box.jpg?​direct&​600 |}}
  
 The ground balloon network station would consist of compact box containing technology needed to discharge the balloon sonde. The device must be able to withstand (in order of several years) the standby mode and wait for the command to release the sonde. ​ The ground balloon network station would consist of compact box containing technology needed to discharge the balloon sonde. The device must be able to withstand (in order of several years) the standby mode and wait for the command to release the sonde. ​
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 It would be then sufficient to dry the hydrogen produced by this method by cartridge with silicagel. ​ It would be then sufficient to dry the hydrogen produced by this method by cartridge with silicagel. ​
  
-Another option is to decompose ​the [[http://​en.wikipedia.org/​wiki/​Sodium_borohydride|Sodium_borohydride]] ​by a catalyst.+Experiments with this metod showed difficulty in obtaining the galium back in order for it to be re-used.  
 + 
 +**Ferrosilicon method** makes use of a reaction between the sodium hydroxide, water and a [[https://​en.wikipedia.org/​wiki/​Ferrosilicon|ferrosilicon]]. 
 + 
 +Another option is a **catalysed decomposition** of the [[http://​en.wikipedia.org/​wiki/​Sodium_borohydride|Sodium_borohydride]]. 
 + 
 +In all cases, the volume of the carrier gas should be optimised with respect to required lift and the rate of climb.  ​
  
 === Firmware === === Firmware ===
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 The GPS must by chosen to function correctly at higher altitudes as well.((Limited by the [[http://​en.wikipedia.org/​wiki/​CoCom#​Legacy|CoCom]] directive)).  ​ The GPS must by chosen to function correctly at higher altitudes as well.((Limited by the [[http://​en.wikipedia.org/​wiki/​CoCom#​Legacy|CoCom]] directive)).  ​
 +
 +== Transmitter ==
 +
 +Integrated transmitters.
 +
 +  * [[http://​www.ti.com/​ww/​en/​analog/​sub_1_GHz_low_power_rf_ic/​index.shtml?​DCMP=rfvalueline&​HQS=Other+OT+rfvalueline|CC115L]]
 +
  
 === Power supply during the flight === === Power supply during the flight ===
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   * A sounding rocket could be a future improvement of the project.   * A sounding rocket could be a future improvement of the project.
    
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en/abl.txt · Last modified: 2017/01/05 19:53 (external edit)