1 00:00:00,820 --> 00:00:08,680 [Music] 2 00:00:14,060 --> 00:00:11,509 so we're gonna change gears I'm not a 3 00:00:16,970 --> 00:00:14,070 biochemist I'm actually an electrical 4 00:00:18,590 --> 00:00:16,980 engineer and I wanted to give a brief 5 00:00:21,109 --> 00:00:18,600 overview to everyone here about some of 6 00:00:22,970 --> 00:00:21,119 this remote sensing and other space 7 00:00:25,400 --> 00:00:22,980 applications that were working at GTRI 8 00:00:30,980 --> 00:00:25,410 collaboration with pubic schools at door 9 00:00:33,319 --> 00:00:30,990 tech so this is outline so first I'll 10 00:00:36,080 --> 00:00:33,329 provide a beep background about Georgia 11 00:00:37,880 --> 00:00:36,090 Georgia Tech in their space history the 12 00:00:39,350 --> 00:00:37,890 bulk of my talks and a focus on this 13 00:00:42,650 --> 00:00:39,360 micro name is IRA which is a remote 14 00:00:45,860 --> 00:00:42,660 sensing CubeSat for measuring the 15 00:00:47,389 --> 00:00:45,870 temperature in the atmosphere and then 16 00:00:49,369 --> 00:00:47,399 I'll wrap up with some other 17 00:00:53,090 --> 00:00:49,379 applications that we've done and take 18 00:00:55,279 --> 00:00:53,100 any questions that you may have so some 19 00:00:57,670 --> 00:00:55,289 of the history of GTRI so back in the 20 00:01:00,500 --> 00:00:57,680 80s we worked with the long-duration 21 00:01:02,510 --> 00:01:00,510 exposure facility which was about a bus 22 00:01:04,310 --> 00:01:02,520 sized satellite in space and was meant 23 00:01:06,050 --> 00:01:04,320 to have some experiments to see the 24 00:01:08,090 --> 00:01:06,060 effects of low Earth orbit in particular 25 00:01:10,760 --> 00:01:08,100 radiation on those experiments similar 26 00:01:12,469 --> 00:01:10,770 biological some of them electrical in 27 00:01:13,910 --> 00:01:12,479 the 90s we worked with the International 28 00:01:16,100 --> 00:01:13,920 Space Station and work on their airlock 29 00:01:25,219 --> 00:01:16,110 antenna and you can see right here you 30 00:01:26,929 --> 00:01:25,229 see a knot and sat the attendant 31 00:01:28,130 --> 00:01:26,939 actually is built into the handle here 32 00:01:30,319 --> 00:01:28,140 and so what they use actually 33 00:01:31,249 --> 00:01:30,329 communicate with their fellow astronauts 34 00:01:33,740 --> 00:01:31,259 and the space station when they're 35 00:01:35,539 --> 00:01:33,750 coming through the airlock as I 36 00:01:37,190 --> 00:01:35,549 mentioned the focus of my talk will be 37 00:01:40,149 --> 00:01:37,200 on these current projects were working 38 00:01:42,140 --> 00:01:40,159 at primarily that micro numbers CubeSat 39 00:01:43,760 --> 00:01:42,150 before we go into the actual engineering 40 00:01:46,010 --> 00:01:43,770 behind Micra numbers I'll give you an 41 00:01:47,450 --> 00:01:46,020 outline of what we were talking about 42 00:01:55,250 --> 00:01:47,460 we're looking at a remote sensing 43 00:02:01,320 --> 00:01:59,070 okay so what we're doing is we're 44 00:02:03,420 --> 00:02:01,330 focusing on the 60 gigahertz RF spectrum 45 00:02:06,710 --> 00:02:03,430 and what we see here in the right hand 46 00:02:08,640 --> 00:02:06,720 side is attenuation or absorption of 47 00:02:11,730 --> 00:02:08,650 electromagnetic radiation against 48 00:02:14,400 --> 00:02:11,740 frequency for oxygen and normally oxygen 49 00:02:16,380 --> 00:02:14,410 has very fine lines in this absorption 50 00:02:18,180 --> 00:02:16,390 spectrum but at lower altitudes we 51 00:02:19,770 --> 00:02:18,190 actually see a polar broadening due to 52 00:02:21,900 --> 00:02:19,780 high pressures in the lower atmosphere 53 00:02:23,640 --> 00:02:21,910 but as you go higher up you actually 54 00:02:25,020 --> 00:02:23,650 start to resolve these different 55 00:02:26,850 --> 00:02:25,030 transition frequencies and what we can 56 00:02:29,420 --> 00:02:26,860 do is because of that we can actually 57 00:02:31,710 --> 00:02:29,430 focus in frequency and bandwidth of our 58 00:02:33,840 --> 00:02:31,720 system and we can actually tune to one 59 00:02:35,880 --> 00:02:33,850 of these transition frequencies and we 60 00:02:37,380 --> 00:02:35,890 can probe along it and by doing that you 61 00:02:40,250 --> 00:02:37,390 can actually focus in a certain area in 62 00:02:44,850 --> 00:02:40,260 the atmosphere and engage is temperature 63 00:02:48,270 --> 00:02:44,860 so by doing that we focused thisis from 64 00:02:50,280 --> 00:02:48,280 MIT by William Lenoir and he provided 65 00:02:53,400 --> 00:02:50,290 that if you chose certain frequencies 66 00:02:54,990 --> 00:02:53,410 and bandwidths across that spectrum you 67 00:02:57,540 --> 00:02:55,000 could resolve these weighting functions 68 00:02:59,130 --> 00:02:57,550 or windows and basically if you choose 69 00:03:01,080 --> 00:02:59,140 these are frequencies and bandwidth so 70 00:03:03,150 --> 00:03:01,090 you're isolating your measurement to 71 00:03:04,620 --> 00:03:03,160 this like an isothermal slab in the 72 00:03:06,930 --> 00:03:04,630 atmosphere so you can actually focus and 73 00:03:08,880 --> 00:03:06,940 measure the temperature of that slab of 74 00:03:09,960 --> 00:03:08,890 the atmosphere am i changing that you 75 00:03:12,449 --> 00:03:09,970 can actually walk across these 76 00:03:17,670 --> 00:03:12,459 frequencies and we've actually optimized 77 00:03:19,170 --> 00:03:17,680 that to account for our equipment and we 78 00:03:20,520 --> 00:03:19,180 see we have seven window functions so if 79 00:03:21,840 --> 00:03:20,530 I were flying over the low Earth orbit 80 00:03:23,910 --> 00:03:21,850 we could actually scan across these 81 00:03:25,650 --> 00:03:23,920 different frequencies and measure from 82 00:03:27,600 --> 00:03:25,660 about 10 kilometers up to 70 kilometers 83 00:03:30,270 --> 00:03:27,610 and get a very large depth profile of 84 00:03:33,720 --> 00:03:30,280 the atmosphere for weather radars and 85 00:03:35,040 --> 00:03:33,730 other applications so I don't know how 86 00:03:37,590 --> 00:03:35,050 many electrical engineers are here so I 87 00:03:41,190 --> 00:03:37,600 won't go too deep into this but one of 88 00:03:44,510 --> 00:03:41,200 the big novel aspects of this system was 89 00:03:46,470 --> 00:03:44,520 that we took a like a board level or 90 00:03:47,670 --> 00:03:46,480 already I'm going to use commercial 91 00:03:49,050 --> 00:03:47,680 off-the-shelf parts and we actually 92 00:03:52,860 --> 00:03:49,060 integrate everything into a single chip 93 00:03:54,180 --> 00:03:52,870 so we see here is a receiver that would 94 00:03:55,710 --> 00:03:54,190 use in a Radiometer where we have an 95 00:03:58,860 --> 00:03:55,720 antenna that's pointing down at the 96 00:04:00,479 --> 00:03:58,870 earth we have gone ship calibration 97 00:04:01,770 --> 00:04:00,489 which usually is a fixed load at a 98 00:04:04,410 --> 00:04:01,780 certain temperature that we can switch 99 00:04:05,720 --> 00:04:04,420 to and calibrate our receiver chant our 100 00:04:08,160 --> 00:04:05,730 receiver channels and then we have 101 00:04:09,870 --> 00:04:08,170 amplification and down conversion 102 00:04:12,000 --> 00:04:09,880 and that lets us select a certain 103 00:04:13,260 --> 00:04:12,010 frequency and then we pass it on to a 104 00:04:15,930 --> 00:04:13,270 filter bank that can select our 105 00:04:18,060 --> 00:04:15,940 different bandwidths to do this we 106 00:04:20,069 --> 00:04:18,070 collaborated with my former advisor at 107 00:04:21,420 --> 00:04:20,079 GT electrical Computer Engineering 108 00:04:23,909 --> 00:04:21,430 school of electrical computer 109 00:04:25,020 --> 00:04:23,919 engineering dr. John kressler who are 110 00:04:28,020 --> 00:04:25,030 leaders in the silicon germanium 111 00:04:30,150 --> 00:04:28,030 research effort said can design these 112 00:04:31,440 --> 00:04:30,160 type of applications on a single chip we 113 00:04:33,150 --> 00:04:31,450 chose silicon germanium because it 114 00:04:34,920 --> 00:04:33,160 provides some performance compared to 35 115 00:04:36,390 --> 00:04:34,930 it's cheaper you can integrate digital 116 00:04:38,909 --> 00:04:36,400 you can bring everything down to a 117 00:04:40,320 --> 00:04:38,919 single chip it has excellent one of a 118 00:04:41,909 --> 00:04:40,330 rough noise which would if you don't 119 00:04:43,890 --> 00:04:41,919 know what that means is that it provided 120 00:04:45,690 --> 00:04:43,900 a good long-term stability in these 121 00:04:47,280 --> 00:04:45,700 systems and its radiation hard 122 00:04:48,510 --> 00:04:47,290 especially particularly for low Earth 123 00:04:52,409 --> 00:04:48,520 orbit and even up to the Jovian 124 00:04:56,100 --> 00:04:52,419 atmosphere so this is what it integrated 125 00:04:57,810 --> 00:04:56,110 radiometer looks like that won't go down 126 00:04:59,820 --> 00:04:57,820 too deep of biggest things I want to 127 00:05:02,580 --> 00:04:59,830 talk about is that it's very small 128 00:05:04,440 --> 00:05:02,590 you bring that whole that whole receiver 129 00:05:06,300 --> 00:05:04,450 channel down to a single chip it's about 130 00:05:09,090 --> 00:05:06,310 one millimeter by two millimeters and 131 00:05:10,950 --> 00:05:09,100 you can see here the power draw it was 132 00:05:13,140 --> 00:05:10,960 only about 81 milliwatts these is this 133 00:05:15,000 --> 00:05:13,150 is a perfect system for CubeSat scoop 134 00:05:16,590 --> 00:05:15,010 size are very limited power distribution 135 00:05:19,800 --> 00:05:16,600 systems and they have very little 136 00:05:22,700 --> 00:05:19,810 limited power battery banks so we really 137 00:05:25,710 --> 00:05:22,710 need to reduce the power requirements 138 00:05:28,590 --> 00:05:25,720 this slide here shows some of the 139 00:05:32,430 --> 00:05:28,600 metrics all I'd want to convey is that 140 00:05:33,920 --> 00:05:32,440 this is comparable to the state of the 141 00:05:36,120 --> 00:05:33,930 art in terms of some of the other 142 00:05:40,890 --> 00:05:36,130 systems coming out of MIT Lincoln lab 143 00:05:42,779 --> 00:05:40,900 NASA or DPL and we allows us to resolve 144 00:05:44,969 --> 00:05:42,789 those temperatures down as we need to 145 00:05:46,650 --> 00:05:44,979 and we're actually working to reduce 146 00:05:48,779 --> 00:05:46,660 this noise figure this this is a 147 00:05:50,610 --> 00:05:48,789 limiting factor and how fine we can get 148 00:05:52,050 --> 00:05:50,620 down to a temperature measurement or 149 00:05:57,029 --> 00:05:52,060 brint trying to bring that down to our 150 00:05:59,520 --> 00:05:57,039 new final system now if we the previous 151 00:06:01,409 --> 00:05:59,530 slide showed some of that the dye 152 00:06:03,180 --> 00:06:01,419 micrograph of that receiver what we're 153 00:06:05,670 --> 00:06:03,190 seeing now is the full integration so 154 00:06:07,350 --> 00:06:05,680 now we have everything we need to look 155 00:06:10,290 --> 00:06:07,360 at 60 gigahertz measure the atmosphere 156 00:06:11,760 --> 00:06:10,300 bring it down to our i/o frequencies 157 00:06:13,680 --> 00:06:11,770 that we can actually digitize it and 158 00:06:15,240 --> 00:06:13,690 bring and beam it down to earth and now 159 00:06:18,390 --> 00:06:15,250 we're including everything we need to 160 00:06:20,760 --> 00:06:18,400 generate the local oscillator frequency 161 00:06:24,330 --> 00:06:20,770 what we need to ACTU downconvert 162 00:06:25,529 --> 00:06:24,340 and everything fits in about 2.5 by 163 00:06:31,170 --> 00:06:25,539 three millimeters squared so it's very 164 00:06:33,719 --> 00:06:31,180 very small so in terms of the actual 165 00:06:35,249 --> 00:06:33,729 payload we're working with professor 166 00:06:37,860 --> 00:06:35,259 Glenn Lightsey from the aerospace 167 00:06:38,879 --> 00:06:37,870 engineering department and I to help go 168 00:06:41,010 --> 00:06:38,889 through this I actually brought a 169 00:06:43,129 --> 00:06:41,020 one-to-one scale model of Micra numbers 170 00:06:45,900 --> 00:06:43,139 so if you don't know what cube SATs are 171 00:06:49,200 --> 00:06:45,910 they have a standard standardization so 172 00:06:51,960 --> 00:06:49,210 a 1u is a 10 centimeter by 10 centimeter 173 00:06:54,029 --> 00:06:51,970 by 10 centimeter volume and has a weight 174 00:06:56,820 --> 00:06:54,039 requirement as well but about 1.3 three 175 00:06:59,370 --> 00:06:56,830 kilograms or about 3 pounds and this is 176 00:07:02,700 --> 00:06:59,380 a 3u spacecraft so it's 10 by 10 by 30 177 00:07:04,260 --> 00:07:02,710 centimeters you can see here we could 178 00:07:07,020 --> 00:07:04,270 break into three sections the lower 179 00:07:08,730 --> 00:07:07,030 section hole to be on this side is our 180 00:07:10,100 --> 00:07:08,740 payload and that's what we're actually 181 00:07:12,689 --> 00:07:10,110 have a Radiometer and all the 182 00:07:15,240 --> 00:07:12,699 electronics we have we need you'll 183 00:07:18,270 --> 00:07:15,250 notice here we see a cone that's 184 00:07:19,710 --> 00:07:18,280 actually a horn antenna which is right 185 00:07:22,050 --> 00:07:19,720 here this is the actual size of what it 186 00:07:23,520 --> 00:07:22,060 would look like this alone had a lot of 187 00:07:24,749 --> 00:07:23,530 engineering behind it cuz normally to 188 00:07:26,999 --> 00:07:24,759 get the performance we need the beam 189 00:07:29,939 --> 00:07:27,009 wits we need to scan through resolving 190 00:07:31,909 --> 00:07:29,949 down to about 50 kilometers swath on the 191 00:07:33,749 --> 00:07:31,919 earth surface from low-earth orbit 192 00:07:35,580 --> 00:07:33,759 normally the three times longer than 193 00:07:38,430 --> 00:07:35,590 this which wouldn't fit and CubeSat so 194 00:07:40,320 --> 00:07:38,440 we re-engineered some got to fit and 195 00:07:43,560 --> 00:07:40,330 have the weight requirements to not push 196 00:07:45,360 --> 00:07:43,570 over what we need if we move over we'll 197 00:07:49,320 --> 00:07:45,370 see the other two modules which is what 198 00:07:51,749 --> 00:07:49,330 dr. Glenn Lightsey has led first of 199 00:07:54,149 --> 00:07:51,759 which was the attitude determination and 200 00:07:56,040 --> 00:07:54,159 control so I'll be this upper module and 201 00:07:58,790 --> 00:07:56,050 that has our Sun sensors for kind of 202 00:08:01,620 --> 00:07:58,800 getting us our bearing and all of our 203 00:08:03,600 --> 00:08:01,630 torque rods and reaction wheels we need 204 00:08:07,680 --> 00:08:03,610 to detail and control the satellite as 205 00:08:09,689 --> 00:08:07,690 its orbiting the earth we also have a 206 00:08:11,730 --> 00:08:09,699 service module which will be the center 207 00:08:14,459 --> 00:08:11,740 of the center region and that has our 208 00:08:16,439 --> 00:08:14,469 electric power system our GPS unit our 209 00:08:17,520 --> 00:08:16,449 command and data handling unit so all 210 00:08:23,129 --> 00:08:17,530 three of these are integrated together 211 00:08:25,200 --> 00:08:23,139 the form to build this and now this kind 212 00:08:27,809 --> 00:08:25,210 this gives you a view of how this would 213 00:08:29,610 --> 00:08:27,819 work so we we launch up we actually go 214 00:08:31,290 --> 00:08:29,620 to the ISS they actually have a CubeSat 215 00:08:32,730 --> 00:08:31,300 launcher on the ISS and they can just 216 00:08:34,380 --> 00:08:32,740 send these out and they're low-earth 217 00:08:37,140 --> 00:08:34,390 orbit when we come out 218 00:08:41,130 --> 00:08:37,150 we D tumble we get in a stable orbit and 219 00:08:43,860 --> 00:08:41,140 then once we are we power up and we're 220 00:08:46,470 --> 00:08:43,870 in our nominal operating regime we start 221 00:08:48,180 --> 00:08:46,480 scanning the Earth's surface we have to 222 00:08:50,220 --> 00:08:48,190 do all our measurements in about seven 223 00:08:52,080 --> 00:08:50,230 seconds because after seven seconds you 224 00:08:52,980 --> 00:08:52,090 pass over fifty seven kilometers or 60 225 00:08:53,580 --> 00:08:52,990 kilometer so we have to do all our 226 00:08:56,220 --> 00:08:53,590 measurements 227 00:08:59,070 --> 00:08:56,230 very quickly digitize it and then as we 228 00:09:00,840 --> 00:08:59,080 move across will scan again as we 229 00:09:02,850 --> 00:09:00,850 approach and we get in Lana's site of 230 00:09:05,040 --> 00:09:02,860 Georgia we actually have a ground 231 00:09:06,630 --> 00:09:05,050 station which I'll cover shortly and 232 00:09:09,570 --> 00:09:06,640 we'll start communicating and getting 233 00:09:12,170 --> 00:09:09,580 our telemetry corrections and also beam 234 00:09:14,160 --> 00:09:12,180 down our data so that we can actually 235 00:09:17,850 --> 00:09:14,170 look at it and share that with 236 00:09:20,310 --> 00:09:17,860 scientists as needed so that covers my 237 00:09:23,280 --> 00:09:20,320 Crenn inves i wanted to touch base on a 238 00:09:26,250 --> 00:09:23,290 few other space related work that we've 239 00:09:27,360 --> 00:09:26,260 done so I'm part of space systems 240 00:09:29,490 --> 00:09:27,370 program office which is under the 241 00:09:31,260 --> 00:09:29,500 advanced concepts lab and they have 242 00:09:34,050 --> 00:09:31,270 experts there in electromagnetics 243 00:09:35,940 --> 00:09:34,060 particularly with tennis and one of the 244 00:09:37,170 --> 00:09:35,950 big things that they've done is develop 245 00:09:39,240 --> 00:09:37,180 these fragments or radiator technology 246 00:09:41,760 --> 00:09:39,250 and what that is they have these custom 247 00:09:44,580 --> 00:09:41,770 in-house algorithms that can take in and 248 00:09:48,360 --> 00:09:44,590 work with scientists or engineers and we 249 00:09:51,090 --> 00:09:48,370 can design this this a ten element for a 250 00:09:53,310 --> 00:09:51,100 very precise performance be it bandwidth 251 00:09:56,490 --> 00:09:53,320 or frequency or maybe you want to cancel 252 00:09:57,900 --> 00:09:56,500 some interference we can design very 253 00:09:59,310 --> 00:09:57,910 large panels and we can integrate that 254 00:10:00,570 --> 00:09:59,320 with all the power divider and 255 00:10:02,220 --> 00:10:00,580 everything else behind that feeds into 256 00:10:04,530 --> 00:10:02,230 that antenna and then that could feed in 257 00:10:06,150 --> 00:10:04,540 right to our satellite you can put it 258 00:10:08,130 --> 00:10:06,160 out on side it's it's easy to space 259 00:10:11,610 --> 00:10:08,140 qualify these antennas so it's really 260 00:10:14,310 --> 00:10:11,620 easy to bring this into space related 261 00:10:15,750 --> 00:10:14,320 applications and for example one of the 262 00:10:17,910 --> 00:10:15,760 projects that we're working on is called 263 00:10:19,440 --> 00:10:17,920 Skyfall and this is not a cube set this 264 00:10:20,850 --> 00:10:19,450 is actually a small set about a hundred 265 00:10:22,890 --> 00:10:20,860 fifty kilograms if I remember correctly 266 00:10:26,520 --> 00:10:22,900 and what we designed is this large 267 00:10:28,920 --> 00:10:26,530 phased array antenna has about ten at 268 00:10:30,480 --> 00:10:28,930 the eight panels and what you can do is 269 00:10:32,760 --> 00:10:30,490 you can build lots of these at 10 270 00:10:34,290 --> 00:10:32,770 aperture as I mentioned and you can scan 271 00:10:36,930 --> 00:10:34,300 the beam because let's try on a CLE 272 00:10:38,430 --> 00:10:36,940 point the beam it's orbiting and this 273 00:10:41,840 --> 00:10:38,440 application had a 1 meter resolution 274 00:10:44,730 --> 00:10:41,850 under 500 climate orbiter is very fine 275 00:10:47,010 --> 00:10:44,740 so now that covers some of the projects 276 00:10:48,370 --> 00:10:47,020 that we've done jour tech and GTRI 277 00:10:50,350 --> 00:10:48,380 specifically is investing 278 00:10:51,580 --> 00:10:50,360 and some facilities to work for our 279 00:10:53,410 --> 00:10:51,590 projects but also eventually working 280 00:10:56,320 --> 00:10:53,420 with any scientists or future projects 281 00:10:58,480 --> 00:10:56,330 one of which was repurposing this 282 00:11:00,010 --> 00:10:58,490 cleanroom it's actually a baker building 283 00:11:02,680 --> 00:11:00,020 which is on Donnelly Street kind of just 284 00:11:04,450 --> 00:11:02,690 a five-minute walk away or it's a class 285 00:11:06,760 --> 00:11:04,460 100 clean room and we're repurposing it 286 00:11:08,020 --> 00:11:06,770 as a space flight assembly area so we 287 00:11:10,690 --> 00:11:08,030 could actually build payloads 288 00:11:13,390 --> 00:11:10,700 in a clean environment qualify them and 289 00:11:14,950 --> 00:11:13,400 send them out and one of the really cool 290 00:11:16,510 --> 00:11:14,960 things we've installed is this ground 291 00:11:17,860 --> 00:11:16,520 station as I mentioned before it's Micra 292 00:11:19,260 --> 00:11:17,870 Nimbus it's orbit around the earth and 293 00:11:21,940 --> 00:11:19,270 measuring we need to beam that data down 294 00:11:23,650 --> 00:11:21,950 so we installed its ground station is in 295 00:11:26,380 --> 00:11:23,660 Cobb County it's actually I think gonna 296 00:11:30,490 --> 00:11:26,390 be near Iron Monger I think actually the 297 00:11:31,810 --> 00:11:30,500 facility there yeah and with that we 298 00:11:34,150 --> 00:11:31,820 have will be able to communicate through 299 00:11:35,320 --> 00:11:34,160 satellite and you know get our data and 300 00:11:37,330 --> 00:11:35,330 share with scientists but also we're 301 00:11:39,610 --> 00:11:37,340 open we're working to with other 302 00:11:43,060 --> 00:11:39,620 engineers and other scientists to use 303 00:11:45,100 --> 00:11:43,070 the facility for other programs so I 304 00:11:47,470 --> 00:11:45,110 hope that provided you with a good 305 00:11:50,200 --> 00:11:47,480 outline of what we do again it's kind of 306 00:11:52,060 --> 00:11:50,210 engineering side we really love building 307 00:11:53,680 --> 00:11:52,070 these systems but we need to talk to 308 00:11:56,620 --> 00:11:53,690 scientists like you because you're the 309 00:11:59,050 --> 00:11:56,630 ones driving these missions so with that 310 00:12:01,910 --> 00:11:59,060 that completes my talk and I'll take any 311 00:12:13,180 --> 00:12:06,150 [Applause] 312 00:12:17,530 --> 00:12:13,190 question of June or two yeah that's 313 00:12:18,550 --> 00:12:17,540 really cool um so are you I think I got 314 00:12:19,540 --> 00:12:18,560 that you're doing single point 315 00:12:23,440 --> 00:12:19,550 measurements it's not scanning 316 00:12:26,410 --> 00:12:23,450 measurements for micro Nimbus 317 00:12:28,150 --> 00:12:26,420 it's a has an eight degree beam with 318 00:12:29,650 --> 00:12:28,160 it's fixed but for some of the 319 00:12:31,060 --> 00:12:29,660 applications we have a phased array but 320 00:12:32,260 --> 00:12:31,070 you said you said you know you have to 321 00:12:35,590 --> 00:12:32,270 do your measurement all at once and it 322 00:12:37,270 --> 00:12:35,600 takes 50 seconds moving across it's 323 00:12:39,370 --> 00:12:37,280 pointed at nadir right so he's just 324 00:12:42,280 --> 00:12:39,380 doing a single point yeah and if you're 325 00:12:43,900 --> 00:12:42,290 not scanning I wore skinny you are scan 326 00:12:44,890 --> 00:12:43,910 yeah well you're taking seven seconds 327 00:12:46,450 --> 00:12:44,900 you're taking the measurements digitize 328 00:12:47,830 --> 00:12:46,460 it it has it passes into the next swath 329 00:12:49,600 --> 00:12:47,840 you take another measurement you know 330 00:12:51,880 --> 00:12:49,610 until until your memories fills and then 331 00:12:53,590 --> 00:12:51,890 you'll dump that and then go again okay 332 00:12:55,330 --> 00:12:53,600 and the idea is to make this cheap 333 00:12:57,040 --> 00:12:55,340 enough that you could launch a 334 00:13:00,190 --> 00:12:57,050 constellation of these right then call 335 00:13:02,740 --> 00:13:00,200 it have a real-time 3d map of the earth 336 00:13:05,020 --> 00:13:02,750 set that's the actual this is what it 337 00:13:06,970 --> 00:13:05,030 actually look the size look like the 3d 338 00:13:08,740 --> 00:13:06,980 printing does not do great on the 339 00:13:10,810 --> 00:13:08,750 panel's they would have to be flat and 340 00:13:12,490 --> 00:13:10,820 they won't be warped like this and you 341 00:13:15,250 --> 00:13:12,500 might have noticed these whip atenas 342 00:13:21,820 --> 00:13:15,260 those are at UHF and that's for 343 00:13:24,130 --> 00:13:21,830 telemetry yeah I guess my question was 344 00:13:38,800 --> 00:13:24,140 censored I was thinking the temporality 345 00:13:39,910 --> 00:13:38,810 of the measurements but I was just 346 00:13:41,500 --> 00:13:39,920 wondering if you had any mass 347 00:13:43,870 --> 00:13:41,510 constraints on your design or if it 348 00:13:45,310 --> 00:13:43,880 factored into any of the selection of 349 00:13:47,590 --> 00:13:45,320 your components because I know for 350 00:13:53,610 --> 00:13:47,600 designing CubeSat NASA usually has some 351 00:13:56,890 --> 00:13:53,620 restrictions on mass size yeah 352 00:14:00,040 --> 00:13:56,900 it's like wait wait okay yeah that is a 353 00:14:02,260 --> 00:14:00,050 big thing so in terms of the actual keep 354 00:14:04,330 --> 00:14:02,270 set itself on a department you know try 355 00:14:06,190 --> 00:14:04,340 to go with weights possible since we're 356 00:14:07,600 --> 00:14:06,200 low Earth orbit shielding is on a bit 357 00:14:10,060 --> 00:14:07,610 constraint my background actually is in 358 00:14:12,070 --> 00:14:10,070 radiation effects in electronics so we 359 00:14:15,130 --> 00:14:12,080 can go light on that in terms of the 360 00:14:16,420 --> 00:14:15,140 antenna by shrieking it we were able to 361 00:14:18,699 --> 00:14:16,430 save away because it's actually heavy 362 00:14:20,230 --> 00:14:18,709 it's actually copper solid copper 363 00:14:22,240 --> 00:14:20,240 but that makes sense for a for example 364 00:14:25,120 --> 00:14:22,250 I'm designing we're still finalizing 365 00:14:26,860 --> 00:14:25,130 some of the board level components for 366 00:14:28,480 --> 00:14:26,870 doing the digitization and we have to be 367 00:14:30,880 --> 00:14:28,490 careful about how many layers as boards 368 00:14:33,550 --> 00:14:30,890 are every any mass matters but as long 369 00:14:35,230 --> 00:14:33,560 as but we always add like a 20% margin 370 00:14:37,060 --> 00:14:35,240 of error so that worst case if you go