Since there are no real configurations in a zoom array, the list of moves (from pad x, to pad y) defines the observing positions. Here they are for my little offering. If anybody wants to generate a reasonable number of samples from these without wanting to study every single one, I suggest looking at every 20th or 30th or so. Start with the antennas on pads 1 to 60 (the compact disk) and then move the antenna on pad 10 to pad 65, then the one on 26 to 78 etc... You'll end up on the Reuleauxish triangle that is the outer ring after 152 moves. Move from to # 1 10 65 2 26 78 3 42 70 4 52 80 5 31 81 6 47 84 7 15 82 8 27 83 9 43 92 10 11 94 11 23 90 12 39 86 13 7 88 14 30 93 15 40 91 16 14 85 17 56 89 18 49 87 19 54 97 20 60 99 21 46 95 22 8 101 23 21 103 24 37 98 25 12 96 26 28 100 27 59 104 28 51 102 29 29 107 30 50 109 31 5 105 32 25 111 33 44 113 34 53 108 35 58 106 36 38 110 37 24 114 38 48 112 39 45 117 40 13 119 41 33 115 42 9 121 43 17 123 44 22 118 45 16 116 46 6 120 47 57 124 48 41 122 49 1 127 50 55 129 51 78 125 52 70 131 53 84 133 54 82 128 55 32 126 56 65 130 57 4 61 58 20 55 59 36 60 60 80 134 61 81 132 62 83 137 63 92 139 64 94 135 65 90 141 66 86 143 67 88 138 68 93 136 69 91 140 70 3 81 71 19 149 72 35 80 73 85 144 74 89 142 75 87 147 76 99 145 77 95 151 78 101 153 79 103 148 80 98 146 81 96 150 82 100 154 83 104 152 84 102 157 85 107 159 86 109 155 87 105 161 88 111 163 89 113 158 90 108 156 91 106 160 92 110 164 93 114 162 94 112 177 95 128 178 96 122 213 97 120 176 98 131 179 99 117 214 100 61 175 101 119 180 102 81 215 103 134 174 104 138 181 105 154 216 106 142 173 107 155 182 108 125 217 109 144 171 110 129 183 111 121 218 112 145 169 113 141 185 114 135 219 115 147 167 116 139 187 117 123 220 118 127 165 119 80 192 120 132 221 121 126 222 122 133 223 123 220 166 124 118 196 125 221 172 126 140 188 127 223 201 128 214 193 129 130 204 130 163 194 131 164 195 132 148 208 133 219 200 134 60 198 135 149 186 136 213 210 137 151 207 138 150 205 139 222 189 140 97 184 141 216 203 142 116 190 143 218 191 144 217 199 145 143 209 146 161 206 147 146 212 148 215 170 149 137 202 150 162 168 151 152 197 152 18 211 Here are the coordinates of the pads in my current design for the ALMA. The table gives, on each line, the serial number, x and y coordinates. The coordinates are in metres E and N of the nominal "centre" at Chajnantor South, which is the designated point for the compact part of the array, at (627807.166, 7453228.830) on the Chilean National Grid, or whatever it is called. There are 223 pads in all. The parts of the array are named as follows:- pads name 1 - 60 central disk 61 - 80 central ellipse 81 - 164 concentric rings of the inverse-square array, to 5 km diameter 165 - 212 Reuleaux triangle (the other 12 pads in the Reuleaux are reused parts of the above 3 components) 213 - 219 Southern Chascon hybrids 220 - 223 North-Eastern Chascon hybrids 1 0 0 627808 7453229 2 15 0 627823 7453229 3 32 10 627839 7453239 4 18 32 627825 7453261 5 17 15 627825 7453244 6 32 25 627839 7453254 7 3 29 627811 7453257 8 45 31 627853 7453260 9 8 43 627815 7453272 10 -10 35 627797 7453264 11 -7 50 627800 7453279 12 33 40 627841 7453269 13 -21 45 627786 7453274 14 -36 43 627771 7453272 15 6 58 627813 7453287 16 -18 60 627789 7453289 17 28 54 627835 7453283 18 -8 12 627799 7453241 19 -25 21 627782 7453249 20 -37 -2 627770 7453227 21 -22 6 627786 7453235 22 -38 13 627769 7453242 23 -27 -13 627781 7453216 24 -50 22 627757 7453251 25 -41 -16 627766 7453212 26 -26 -28 627781 7453201 27 -40 -33 627767 7453196 28 -52 7 627755 7453236 29 -29 -43 627778 7453186 30 -20 -55 627787 7453174 31 -53 -25 627754 7453204 32 -43 -47 627764 7453182 33 -61 -5 627746 7453224 34 -6 -14 627801 7453215 35 -5 -34 627802 7453195 36 20 -32 627827 7453196 37 5 -23 627813 7453205 38 8 -41 627815 7453188 39 24 -18 627832 7453211 40 6 -56 627813 7453173 41 35 -29 627842 7453200 42 37 -10 627844 7453219 43 48 -20 627855 7453209 44 20 -50 627827 7453179 45 51 -5 627858 7453223 46 57 8 627864 7453237 47 48 -35 627856 7453194 48 62 -15 627870 7453213 49 34 -52 627842 7453177 50 42 52 627850 7453281 51 32 68 627839 7453297 52 8 73 627815 7453301 53 -12 74 627795 7453303 54 -31 67 627776 7453296 55 -50 48 627757 7453277 56 -35 -60 627772 7453169 57 -19 -70 627788 7453159 58 35 -67 627842 7453162 59 16 -67 627823 7453162 60 -6 -76 627801 7453152 61 58 44 627866 7453273 62 56 65 627863 7453294 63 44 82 627851 7453311 64 11 90 627818 7453319 65 -18 91 627789 7453320 66 -3 106 627804 7453335 67 17 111 627824 7453340 68 37 102 627844 7453331 69 58 98 627865 7453327 70 51 118 627858 7453347 71 62 -47 627869 7453182 72 49 -79 627856 7453150 73 16 -85 627823 7453144 74 -20 -88 627787 7453141 75 35 -94 627842 7453134 76 56 -99 627863 7453130 77 17 -106 627824 7453123 78 -4 -106 627803 7453123 79 39 -115 627846 7453114 80 54 -130 627861 7453099 81 106 109 627914 7453338 82 139 53 627946 7453281 83 139 -44 627946 7453184 84 109 -101 627916 7453128 85 72 -210 627879 7453019 86 162 -164 627969 7453065 87 198 -103 628005 7453126 88 190 80 627997 7453309 89 101 163 627908 7453392 90 23 162 627830 7453391 91 -15 141 627792 7453370 92 -81 27 627726 7453256 93 -60 -128 627747 7453101 94 13 -200 627820 7453029 95 50 233 627857 7453462 96 -95 125 627712 7453354 97 -133 28 627674 7453257 98 -90 -228 627717 7453001 99 71 -333 627879 7452896 100 206 -287 628013 7452942 101 279 -190 628086 7453039 102 306 -20 628113 7453209 103 241 152 628048 7453381 104 163 220 627970 7453448 105 -31 290 627776 7453518 106 -201 55 627606 7453284 107 -220 -163 627588 7453066 108 -174 -314 627633 7452915 109 -58 -462 627749 7452767 110 217 -497 628024 7452732 111 427 -244 628234 7452985 112 427 42 628234 7453271 113 287 271 628094 7453500 114 158 327 627965 7453556 115 -201 325 627606 7453553 116 -343 -128 627464 7453101 117 -279 -443 627528 7452786 118 -42 -686 627765 7452543 119 206 -726 628013 7452503 120 511 -562 628318 7452667 121 640 -322 628447 7452907 122 643 -15 628450 7453214 123 527 217 628334 7453446 124 282 384 628089 7453613 125 42 470 627849 7453699 126 -490 105 627317 7453334 127 -530 -300 627277 7452929 128 -363 -712 627444 7452516 129 -125 -950 627682 7452278 130 216 -990 628023 7452239 131 716 -816 628523 7452413 132 962 -347 628769 7452882 133 891 192 628698 7453421 134 311 486 628119 7453715 135 153 700 627960 7453929 136 -633 185 627174 7453413 137 -784 -506 627023 7452723 138 -210 -1395 627597 7451834 139 145 -1649 627952 7451580 140 883 -1387 628690 7451842 141 1319 -887 629127 7452342 142 1375 -252 629182 7452977 143 1169 312 628976 7453540 144 724 629 628531 7453858 145 -220 875 627587 7454104 146 -1054 26 626753 7453255 147 -1197 -498 626610 7452731 148 -808 -1736 626999 7451493 149 81 -2316 627888 7450913 150 946 -2252 628754 7450977 151 2105 -1197 629912 7452032 152 2081 18 629889 7453247 153 1280 820 629087 7454048 154 486 1034 628293 7454263 155 -435 1240 627372 7454469 156 -1713 -347 626095 7452882 157 -1641 -1720 626166 7451508 158 -546 -3205 627261 7450024 159 970 -3887 628777 7449342 160 2121 -3467 629928 7449762 161 2978 -1998 630785 7451231 162 3034 -54 630841 7453175 163 2351 883 630158 7454112 164 843 1518 628650 7454747 165 8704 7383 636511 7460612 166 8124 7120 635931 7460349 167 7518 6962 635325 7460191 168 6911 6568 634718 7459797 169 6226 6200 634033 7459428 170 5699 5989 633506 7459218 171 4908 5516 632715 7458745 172 4275 5148 632082 7458377 173 4249 4385 632056 7457614 174 3563 3202 631370 7456431 175 3065 2734 630872 7455963 176 2852 2150 630659 7455379 177 2509 1440 630316 7454669 178 2614 -4440 630422 7448788 179 3168 -4923 630975 7448305 180 3827 -5029 631634 7448200 181 4644 -5476 632451 7447753 182 5461 -5555 633268 7447674 183 6111 -5893 633918 7447335 184 6990 -6028 634797 7447201 185 8071 -6212 635878 7447017 186 8598 -6291 636405 7446938 187 9653 -6554 637460 7446675 188 10050 -6300 637857 7446929 189 10075 -6300 637882 7446929 190 10136 -6265 637943 7446964 191 10300 -6300 638107 7446929 192 11307 -6260 639114 7446969 193 12183 -6159 639991 7447069 194 12210 -5292 640017 7447937 195 12315 -4503 640122 7448726 196 12737 -3924 640544 7449305 197 12948 -2846 640755 7450383 198 13027 -1742 640834 7451487 199 13212 -1032 641019 7452197 200 13027 -243 640834 7452986 201 13137 543 640945 7453772 202 12579 1861 640386 7455090 203 12684 2518 640491 7455747 204 12236 3149 640043 7456378 205 11920 4122 639727 7457351 206 11287 4411 639094 7457640 207 10259 5121 638066 7458350 208 9622 5684 637429 7458913 209 9609 5706 637416 7458934 210 9549 5741 637356 7458969 211 9497 5901 637304 7459129 212 9574 6200 637381 7459428 213 3780 -1031 631588 7452197 214 4560 -1050 632368 7452179 215 4597 -2071 632404 7451157 216 5958 -2017 633765 7451212 217 6974 -2236 634781 7450993 218 8244 -2181 636051 7451048 219 9006 -1469 636813 7451760 220 8647 3832 636454 7457060 221 9173 3223 636980 7456452 222 9331 2694 637138 7455923 223 9620 2218 637427 7455447