2 # Using Altus Metrum Products
6 All Altus Metrum products are available from the
7 [Garbee and Garbee](https://shop.gag.com) web
8 store. [TeleMetrum](TeleMetrum/) starter kits are also available from
9 [Apogee Components](http://www.apogeerockets.com/Altus_Metrum_GPS.asp)
10 and [Australian Rocketry](http://www.ausrocketry.com/shop/index.php?main_page=product_info&cPath=111&products_id=4302).
14 In the US, you need an [amateur radio license](../Radio) or other
15 authorization to legally operate the radio transmitters that are part
16 of our products. Rules vary in other countries.
20 In the rocket itself, you just need a [TeleMetrum](../TeleMetrum) board and
21 a LiPo rechargeable battery. An 900mAh battery weighs less than a 9V
22 alkaline battery, and will run a [TeleMetrum](../TeleMetrum) for hours.
24 [This document](InsertSheet.pdf) contains notes about how to install a
25 flight computer such as TeleMetrum in a rocket.
27 By default, we ship TeleMetrum with a simple wire antenna. If your
28 electronics bay or the airframe it resides within is made of carbon fiber,
29 which is nearly opaque to RF signals, you may choose to have an SMA connector
30 installed so that you can run a coaxial cable to an antenna mounted
31 elsewhere in the rocket.
35 To receive the data stream from the rocket, you need an antenna and short
36 feedline connected to one of our [TeleDongle](../TeleDongle) units. The
37 TeleDongle in turn plugs directly into the USB port on a notebook
38 computer. Because TeleDongle looks like a simple serial port, your computer
39 does not require special device drivers... just plug it in.
41 All of our application software is written in Java, and supports Linux,
42 Windows, and MacOS systems equivalently. See our [AltOS](/AltOS) page
43 for more details and to download a copy.
45 After the flight, you can use the RF link to extract the more detailed data
46 logged in the rocket, or you can use a mini USB cable to plug into the
47 TeleMetrum board directly. Pulling out the data without having to open up
48 the rocket is pretty cool! A USB cable is also how you charge the LiPo
49 battery, so you'll want one of those anyway... the same cable used by lots
50 of digital cameras and other modern electronic stuff will work fine.
52 If your rocket lands out of sight, you may enjoy having a hand-held GPS
53 receiver, so that you can put in a waypoint for the last reported rocket
54 position before touch-down. This makes looking for your rocket a lot like
55 Geo-Cacheing... just go to the waypoint and look around starting from there.
57 You may also enjoy having a ham radio "HT" that covers the 70cm band... you
58 can use that with your antenna to direction-find the rocket on the ground
59 the same way you can use a Walston or Beeline tracker. This can be handy
60 if the rocket is hiding in sage brush or a tree, or if the last GPS position
61 doesn't get you close enough because the rocket dropped into a canyon, or
62 the wind is blowing it across a dry lake bed, or something like that... Keith
63 and Bdale both currently own and use the
64 [Yaesu VX-6R](http://yaesu.com/indexVS.cfm?cmd=DisplayProducts&ProdCatID=111&encProdID=4C6F204F6FEBB5BAFA58BCC1C131EAC0&DivisionID=65&isArchived=0)
67 So, to recap, on the ground the hardware you'll need includes:
69 * an antenna and feedline
72 * optionally, a handheld GPS receiver
73 * optionally, an HT or receiver covering 435 Mhz
75 The best hand-held commercial directional antennas we've found for radio
76 direction finding rockets are from
77 [Arrow Antennas](http://www.arrowantennas.com/). The 440-3 and 440-5 are
78 both good choices for finding a TeleMetrum-equipped rocket when used with
81 Find more information about antennas, HTs, and getting a ham radio license
82 on our [Radio](../Radio) page.
86 Our software makes it easy to log the data from each flight, both the
87 telemetry received over the RF link during the flight itself, and the more
88 complete data log recorded in the DataFlash memory on the TeleMetrum
89 board. Once this data is on your computer, you can replay the flight in
90 real time, get plots and summary information from your data,
91 export a CSV file for further manipulation in your favorite spreadsheet,
92 or export a KML file so that you can visualize the flight path in three
93 dimensions with [Google Earth](http://www.google.com/earth)!
95 Our ultimate goal is to emit a set of files for each flight that can be
96 published as a web page per flight, or just viewed on your local disk with
101 In the future, we intend to offer "companion boards" for the rocket that will
102 plug in to TeleMetrum to collect additional data, provide more pyro channels,
103 and so forth. We've built and flown some prototypes including
104 [TeleScience](/TeleScience), but no companion board designs have made it to
107 We intended to publish a reference design
108 for a companion board, but one of our customers beat us to it! You can find
109 his work on how to use an Arduino as a companion board on
110 [GitHub](https://github.com/robderstadt/AltOSCompanion).
112 Because all of our work is open, both the hardware designs and the software,
113 if you have some great idea for an addition to the current Altus Metrum family,
114 feel free to dive in and help! Or let us know what you'd like to see that
115 we aren't already working on, and maybe we'll get excited about it too...