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--- projects:picoatlas:picoatlasviii [2012/11/20 18:39] – jcoxon
+++ projects:picoatlas:picoatlasviii [2012/12/18 07:13] (current) – jcoxon
@@ Line 1: / Line 1: @@
+====== PicoAtlas VIII ======
-====== Experiments ======
+===== Components =====
-UKHAS badge board with RFM22, Arduino328 with 8Mhz external crystal (no brownout) running off a 1.8v MCP1700 regulator, 2.5V 10F supercap in parallel to badge board. Charged initially by 3.7v lipo and then this supply is removed.
+  * pAVA R7 board with linear regulator
+    * Atmega328
+    * Rfm22b
+    * Ublox 6
+  * 2 x AAA
+  * 2 x 3.7v 100mA solar cells in parallel
-  * 50baud, 1 string every minute, under a lamp indoors
+===== Launch 1 =====
-    * Just Cap = 5mins 36secs
-    * Solar Cell = 18mins 49secs
+  * Launch 1 was on 15/12/12 - unfortunately on releasing the payload it did not have enough lift resulting in it dragging across the fields and getting caught in a tree 2km away, max altitude was 101m. Was recovered the next day (still transmitting).
-  * 300baud, 1 string every minute, under a lamp indoors
-    * Just Cap = 12mins 21secs
+==== Lessons ====
-    * Solar Cell = Continuous
+  * Need to launch Pico's in ideal weather, from now onwards I plan to only launch in:
+    * Ground windspeed < 8km/h
+    * < 50% cloud cover
+    * no rain or forecast rain
+  * Need to take in to account that lifting gas might cool once outside and lose lift, may require a little more gas before launch.