highaltitude.log.20181120

[00:11] <SpacenearUS> New vehicle on the map: 03LACHLAN_RX_chase - 12https://tracker.habhub.org/#!qm=All&q=LACHLAN_RX_chase
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[01:21] Nick change: BitEvil -> SpeedEvil
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[03:36] <SpacenearUS> New position from 03BSS18 after 0311 hours silence - 12https://tracker.habhub.org/#!qm=All&q=BSS18
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[11:07] <SpacenearUS> New position from 03IV3SRD-11 after 039 hours silence - 12https://tracker.habhub.org/#!qm=All&q=IV3SRD-11
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[11:39] <SpacenearUS> New vehicle on the map: 03Legionowo - 12https://tracker.habhub.org/#!qm=All&q=Legionowo
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[12:07] <SA6BSS-Mike> michal_f: are you flying or is it a simulation?
[12:24] <michal_f> it's a radiosonde
[12:25] <michal_f> meteo
[12:25] <michal_f> supposed to drop near my house, so keeping an eye :)
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[15:01] <SA6BSS-Mike> michal_f: ok, did it land close?
[15:02] <michal_f> no, unfortunatelly not
[15:03] <michal_f> otoh, I'm at work now so I couldn't go hunting
[15:04] <SA6BSS-Mike> oki
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[15:48] Nick change: BitEvil -> SpeedEvil
[15:50] <FuzzyLemon> Hi Everyone. Is there a CAA restriction on the mass of a HAB payload? If yes, what is it?
[15:54] <AndyEsser> If you make it above 7kg you'll fall under issues regarding certification
[15:54] <AndyEsser> there are likely other lower restrictions
[15:54] <craag> FuzzyLemon: No real restriction afaik, but it gets v v difficult above 6kg, or >2kg in a single package.
[15:54] <craag> See ANO exemptions appendix 2.
[15:55] <SpeedEvil> Once you're under 2m balloon diameter at any altitude, nearly all of the restrictions go away
[15:55] <SpeedEvil> This means quite a light payload though, at altitude
[15:56] <craag> iirc Steve mentioned that this category, "Heavy", were only really considered by CAA in test ranges.
[15:57] <craag> SpeedEvil: <2m overall diameter including your payload.
[15:57] <craag> Which you're not going to get more than a couple of kg off the ground with :P
[15:58] <SpeedEvil> craag: yes.
[16:00] <FuzzyLemon> so you'd have to launch from a test range if paylaod was >7kg
[16:00] <craag> FuzzyLemon: "Heavy balloon" is >6kg. See the ANO for classfication.
[16:00] <daveake> >4kg AIUI ... the CAA are considering medium as large., IIRC
[16:00] <craag> Even Medium I think might be hard, can't remember, haven't needed to try myself :)
[16:00] <AndyEsser> apologies, my >7kh figure came from CAP722 which is for UAVs not balloons
[16:01] <AndyEsser> kg*
[16:01] <FuzzyLemon> ok thanks
[16:01] <FuzzyLemon> just asking for a friend btw ;)
[16:02] <daveake> Try and get it below 4kg if at all possible
[16:02] <craag> that's 4kg total with two or more packages, each <3kg.
[16:02] <daveake> yup
[16:06] <daveake> If you do "go large" it's a PITA according to Steve ... launching from a danger area, lodging a flight path, 2 independent cutdowns etc.
[16:08] <fsphil> https://www.youtube.com/watch?v=siwpn14IE7E
[16:09] <fsphil> *sings* "launching from a ... danger area"
[16:19] <daveake> :)
[16:21] <fsphil> I'd be too worried about the descent speed to launch something heavy
[16:21] <fsphil> launches are often stressful enough without worrying that you're about to punch a hole in someones roof
[16:22] <daveake> Yeah it's nice when you've only got 200g or so ... less worry about where it's going to land
[16:24] <fsphil> not so bad in the likes of australia, places where nobody lives
[16:24] <daveake> Nobody important
[16:24] Action: daveake waits for Darkside ...
[16:25] <daveake> If I ever launch in Oz, I'm launching a drop bear
[16:26] <craag> :D
[16:26] <SpeedEvil> :)
[16:27] <SpeedEvil> If you can design the payload, so you would not be unhappy if it landed on the head of a child, that's a good place to be in.
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[16:58] <gonzo_> does that factor in the person's attitude towards children?
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[17:01] <AndyEsser> or the square area of the child's head?
[17:03] <fsphil> assume a spherical child
[17:05] <AndyEsser> not an assumption with my son
[17:05] <AndyEsser> fatty
[17:05] <AndyEsser> :D
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[17:08] <fsphil> I'm heading that way myself. need to cut down on the jaffa cakes
[17:08] <AndyEsser> haha
[17:08] <AndyEsser> I need to lose some
[17:08] <AndyEsser> got a year to go to the wedding - would prefer to look a bit better
[17:09] <AndyEsser> although given I bought my wedding suit yesterday.... I guess I can't really lose that much!
[17:09] <SpeedEvil> You could always donate it as the marquee.
[17:09] Action: SpeedEvil also needs to cut down on the pies.
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[17:09] <AndyEsser> :O
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[17:10] <SpeedEvil> Also, are you banned from HAB if you don't fit inside a 2m sphere?
[17:11] <daveake> Just need an exemption
[17:11] <AndyEsser> don't most of us fall outside that? :D
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[17:11] <AndyEsser> and _definitely_ over 6kg
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[17:27] <miek> has anyone run a payload on the HF ISM bands, ~13.56MHz for example?
[17:36] <SpacenearUS> New position from 03BSS18 after 038 hours silence - 12https://tracker.habhub.org/#!qm=All&q=BSS18
[17:44] <mfa298> miek: I think Leo tried but it didn't work that well partly due to needing a larger antenna and also a lot of noise
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[18:07] <SpacenearUS> New position from 03RTLS1 after 034 days silence - 12https://tracker.habhub.org/#!qm=All&q=RTLS1
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[18:22] <SpacenearUS> New vehicle on the map: 03W7ASM-11 - 12https://tracker.habhub.org/#!qm=All&q=W7ASM-11
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[18:43] <SpacenearUS> New vehicle on the map: 03K9GXP-11 - 12https://tracker.habhub.org/#!qm=All&q=K9GXP-11
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[19:15] <SpacenearUS> New vehicle on the map: 03SSTAR0276 - 12https://tracker.habhub.org/#!qm=All&q=SSTAR0276
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[22:16] <nigle> 13.56MHz is used by a lot of RFID cards, probably unusable for anything else. As for the large antenna, a very long but thin wire doesn't weigh much but might get tangled up too easily.
[22:19] <SA6BSS-Mike> to lauch a payload with a 10m wire takes some preberation and low winds , max 4-5ms in the gusts
[22:20] <SA6BSS-Mike> I have made a chart of different wire diamater vs weight
[22:21] <SA6BSS-Mike> if I could find it...
[22:23] <SA6BSS-Mike> for 5m length , 0,12 - 0,6gram
[22:23] <bertrik> I heard an interesting story about the frequencies used with LoRaWAN
[22:23] <SA6BSS-Mike> 0,15 - 0,75gram
[22:24] <SA6BSS-Mike> 0,2 - 1,25gram
[22:24] <bertrik> The guys at TheThingsNetwork did a comparison between use of the LoRaWAN frequencies in different networks, it turned out that a particular commercial provider was avoiding a certain LoRaWAN frequency
[22:24] <SA6BSS-Mike> Im using 0,12 for lower leg and 0,16 for upper
[22:25] <bertrik> it turned out to be some kind of frequency typically used for RFID, so probably unusable in urban/commercial areas
[22:31] <SA6BSS-Mike> thats a coll lora board, should be ready to fly out of the box, solar charger and all https://shop.sodaq.com/sodaq-one-eu-rn2483-v3.html
[22:32] <SA6BSS-Mike> *cool
[22:33] <SA6BSS-Mike> and they did https://www.thethingsnetwork.org/article/ground-breaking-world-record-lorawan-packet-received-at-702-km-436-miles-distance
[22:39] <michal_f_home> nice gadget !
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[23:06] <SpacenearUS> New position from 03IV3SRD-11 after 0310 hours silence - 12https://tracker.habhub.org/#!qm=All&q=IV3SRD-11
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[00:00] --- Wed Nov 21 2018