Merge pull request #1 from UniversalScientificTechnologies/GEODOS01A

Documentation update

README.md

@@ -2,34 +2,40 @@
 *Open-source scintillation detector of ionizing radiation. The device can be further modified according to specific requirements. Character of its construction makes it especially suitable for placement into mountaints to in-field measurement*
 
 
-![AIRDOSC01A front panel](/doc/src/img/AIRDOSC01A_box_front.jpg "AIRDOS front panel")
+![Solar powered GEODOS01A](/doc/src/img/GEODOS01A.jpg "GEODOS01A prototype")
 
 
-**Technical parameters are following:** 
+### Technical parameters
 
-* Detection element: scintillation crystal NaI(Tl) 10 mm diameter 20 mm lenght integrated with SiPM detector
+* Detection element: scintillation crystal NaI(Tl) 10 mm diameter 20 mm length integrated with SiPM detector
 * Power source: solar panel
+* Backup power source: rechargable 18650 Li-ion cell
 * Data memory: SD card
 * Record’s content: energy and time of each event
 * Record’s periodicity: 10 s (maximal dead time 2 s)
 * Time resolution: 20 us
 * Accuracy of event’s time: 500 ns
-* Energy range: 0.3 to 1 MeV (0,2 MeV resolution) 
+* Energy range: 0.3 to 1 MeV (0,2 MeV resolution)
 * Open-source HW and SW
 * Device status indicator type LED
 * Uniterrupted measurement interval 365 days minimum
 * LoRa connection to IoT network
 * Weather resistivity IP 65
 
 
-**Device block diagram**
+### Device block diagram
 ![GEODOS01A block diagram](hw/sch_pcb/GEODOS01A_block.png)
 
 
-**Production data of electronic modules**
+
+The core of the detector  - scintillation crystal with [SiPM detector](https://en.wikipedia.org/wiki/Silicon_photomultiplier).
+
+![Scintillation detector](/doc/src/img/GEODOS01A_sensor.jpg)
+
+### Production data of used electronic modules
 
 * [SIPMPOWER01A](https://github.com/UniversalScientificTechnologies/AIRDOSC01/tree/AIRDOSC01A/hw/sch_pcb/SIPMPOWER01A)
-* [SIPM01B](https://github.com/UniversalScientificTechnologies/AIRDOSC01/tree/AIRDOSC01A/hw/sch_pcb/SIPM01B/hw/sch_pcb) 
-* [PCRD05A](http://mlab.ust.cz/module/PCRD05A) 
-* [GPS01B](http://mlab.ust.cz/module/GPS01B) 
-* [DATALOGGER01A](http://mlab.cz/module/DATALOGGER01A) 
+* [SIPM01B](https://github.com/UniversalScientificTechnologies/AIRDOSC01/tree/AIRDOSC01A/hw/sch_pcb/SIPM01B/hw/sch_pcb)
+* [PCRD05A](http://mlab.ust.cz/module/PCRD05A)
+* [GPS01B](http://mlab.ust.cz/module/GPS01B)
+* [DATALOGGER01A](http://mlab.cz/module/DATALOGGER01A)