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-TeleMetrum Low-level Access
-	CC1111 4-wire debug interface:
-		debug data, debug clock, reset, ground
-	CP2103 -- 4 GPIOs controlled from USB
-		One USB packet per half clock
-	Beagle USB hardware monitor
-	CC1111-based debug link
-		emulates serial on USB
-		provides high-level commands
-
-TeleMetrum Software Development Environment
-	Small Device C Compiler, targeting 8051 CPU
-	Source Debugger for SDCC
-	Hex debugger using either CP2103 or CC1111 link
-		Emulates mcs51 emulator
-		Except talks to real hardware
-		Hooks up to sdcdb
-
-AltOS architecture
-	Multi-threaded
-		Avoids the 'one big loop'
-	Non pre-emptive
-		Limits where pre-emption can occur
-	sleep/wakeup rendezvous
-		Good enough for Linux
-	Timers, mutexes
-		Basic OS services
-
-Flight software architecture
-	Flight progress tracked through discrete states
-		Pad - Sitting vertically
-		Boost
-			Acceleration > 2g and Speed > 5m/s
-			or
-			Height > +20m
-		Fast
-			Acceleration < -1/4g
-			or
-			Boost period > 15s
-		Coast
-			Speed < 200m/s
-			or
-			Height < Max_height - 500m
-		Apogee
-			Height < Max Height - 10m
-		Main
-			Height < Main Height
-		Land
-			Acceleration stable for 5 seconds
-			Height stable for 5 seconds
-			Height < Launch height + 1000m
-	
-Calibration
-	Radio calibrated by adjusting PLL against freq counter
-		48MHz crystal good to 20ppm
-		20ppm at 434MHz is 9Khz
-	Accelerometer calibrated by rotating board on bench
-		Accelerometer output runs through 5V->3.3V divider
-		Uses 1% resistors
-		Also automatically adjusts for 100G/50G/40G devices
-
-GPS adventures
-	Problem: GPS looses satellites during boost phase
-	GPS receivers track sats by synthesizing expected signal
-		frequency based on relative velociy
-		phase based on distance
-	Change in actual signal means changing synthetic signal
-		High acceleration means allowing faster changes
-	Change rate limited by 'loop filter' bandwidth.
-
-Drag race plots
-
-Standard flight plot set
-
-Plot from VA flight 2009-04-19
-Plot from LDDD flight 2009-05-??
-Overview Data for nike flight
-
-google earth plot for ToT from Hudson