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--- projects:hadie [2011/01/11 21:43] – [Third Flight] fsphil
+++ projects:hadie [2011/02/28 08:40] – [Third Flight] fsphil
@@ Line 58: / Line 58: @@
 The flight code for Hadie-2 is available here: http://github.com/fsphil/hadie
 ===== Third Flight =====
-A third flight is planned for Mid-March 2011. The plan this time is:
+A third flight is planned for early-March 2011. The plan this time is:
-  * Go back to using the Vertical Bazooka antenna as used on the first flight! Need to find some way to keep it straight as the payload spins around.
+  * Add a 16-bit checksum to the SSDV packet structure. [Done in github]
-  * A proper PCB instead of strip-board.
+  * Fixed a trivial bug that caused the baud rate to be slower than expected. [Done]
-  * Add a 16-bit checksum to the SSDV packet structure.
+  * Switch to a low power mode after landing.
-  * Use Reed-Solomon error correction on the telemetry strings.
+  * Add temperature sensors.
-  * Have dl-fldigi configured to use a narrower filter width.
-Apart from the antenna problems everything went extremely well for Hadie's first solo flight, so this flight will not change too much.
+==== Antenna ====
+I plan to use a 1/4 wave vertical again, but made in the style of the bazooka vertical used on the first flight. The end of the coax will be stripped back 1/4 wavelength, with the outer shield folded back and split into the four radials. To help keep the antenna from flexing as the payload spins, the ends of the radials will be fixed to the payload box and a straw placed over the vertical element. Without any solder joints it should be much more reliable than my previous attempt at this style of antenna.