missing space!

[web/altusmetrum] / TeleMetrum / index.mdwn

diff --git a/TeleMetrum/index.mdwn b/TeleMetrum/index.mdwn
index 46f16f7e5f0ee9dd8b6259e5563ca9382e9a9ff3..62bc158ff2221fb76d1175055d014f5cd0efa2e3 100644 (file)
--- a/TeleMetrum/index.mdwn
+++ b/TeleMetrum/index.mdwn
@@ -3,8 +3,18 @@
 This is a recording dual-deploy altimeter for high power model rocketry 
 with integrated GPS and telemetry link.  
 
-These are photos of our current version,
-which includes an integrated GPS receiver and patch antenna:
+Production units are available from the 
+[Garbee and Garbee](http://auric.gag.com) web store.
+
+These are photos of our current production version, which includes an 
+integrated GPS receiver with active patch antenna:
+
+<a href="v1.0/cimg5972-crop.jpg"> <img src="v1.0/cimg5972-thumb.jpg"></a>
+<a href="v1.0/cimg5974-crop.jpg"> <img src="v1.0/cimg5974-thumb.jpg"></a>
+
+These are photos of our second version, which included the integrated Venus
+GPS receiver, but with a passive patch antenna that turned out to have 
+disappointing performance due to our many PCB geometry constraints:
 
 <a href="v0.2/cimg5164-cropped.jpg"> <img src="v0.2/cimg5164-thumb.jpg"></a>
 <a href="v0.2/cimg5171-cropped.jpg"> <img src="v0.2/cimg5171-thumb.jpg"></a>
@@ -71,8 +81,9 @@ always want GPS on board, which lead to our current second generation boards.
                * SPI interface
                * other parts in this Atmel DataFlash series can optionally be used
        * [SkyTraq](http://www.skytraq.com.tw/) Venus634FLPx GPS receiver
-               * on-board passive patch antenna
-               * U.FL connector with 3.3V DC for optional external amplified antenna
+               * on-board [Taoglas AP.17A.01[(http://www.taoglas.com/antennas/GPS_Antennas/Internal_GPS_-_Active_Patch_Modules/) 
+                 single-stage active patch antenna
+               * U.FL connector with 3.3V DC can be re-purposed for optional external amplified antennas
                * async serial interface
        * [Freescale MP3H6115A](http://www.freescale.com/webapp/search.partparamdetail.framework?PART_NUMBER=MP3H6115A6U) pressure sensor
        * [Freescale MMA2202EG](http://www.freescale.com/webapp/search.partparamdetail.framework?PART_NUMBER=MMA2202EG) 50g accelerometer.  Can use 40-200g variants!
@@ -105,7 +116,7 @@ always want GPS on board, which lead to our current second generation boards.
 The elimination of the discrete temperature sensor and second LED were
 necessary to support the companion board interface added in v0.2.
 
-## [Production History](production) ##
+## [Production History](../production) ##
 
 ## [Flight Logs](flightlogs) ##
 
@@ -118,6 +129,12 @@ necessary to support the companion board interface added in v0.2.
   place parts!  Without an inspection microscope, loading and testing these
   boards might be impossible.
 
+* The addition of on-board GPS in v0.2 means that the total power consumption
+  can exceed the rate at which we draw power from the USB interface, 
+  particularly when the GPS is in cold start mode.  This means a battery must 
+  be attached during operation, and also that the battery will only charge 
+  effectively from USB when the board is turned off.
+
 * The v0.1 artwork had three issues, two of which required physical rework
   on each board.  All of these issues were fixed in v0.2.
 
@@ -173,12 +190,11 @@ can be found on the [AltOS](../AltOS) page on this site.
 
 ## Future Plans ##
 
-As of early February 2010, three prototypes of v0.2 are done and working on 
-the bench.  We hope to flight test them shortly, then arrange a production
-run in time to make TeleMetrum available in assembled and tested form to 
-others in the rocketry hobby who have expressed interest in time for the 
-2010 flying season.
+As of early March 2010, three prototypes of v0.2 exist and have flown with 
+great success.  We will initiate a production run shortly with the goal of 
+making TeleMetrum available in assembled and tested form to others in the 
+rocketry hobby in time for the 2010 flying season.
 
-Because we understand that not everyone uses Linux, we've started discussing 
+Because we understand that not everyone uses Linux, we are investigating
 the best way to make a cross-platform ground station program for use with 
 [AltOS](../AltOS), perhaps in Java...