# Focal plane mapping cut-and-pasted from DESI-0530v16 tab "S,Z,N fits"
#   R = CS5 sqrt(X**2 + Y**2) [mm]
#   Z = CS5 Z coordinate [mm]
#   S = distance along curved focal surface [mm]
#   N = nutation angle of positioner alignment (wrt +Z) [degrees]
# all units in mm.
#
R Z S N
0.0	0.000000	0.000000	0.001722
1.0	-0.000100	1.000000	0.010606
2.0	-0.000402	2.000000	0.019486
3.0	-0.000904	3.000000	0.028362
4.0	-0.001607	4.000000	0.037235
5.0	-0.002511	5.000001	0.046104
6.0	-0.003616	6.000001	0.054970
7.0	-0.004922	7.000002	0.063833
8.0	-0.006430	8.000003	0.072694
9.0	-0.008138	9.000005	0.081551
10.0	-0.010047	10.000007	0.090407
11.0	-0.012158	11.000009	0.099260
12.0	-0.014470	12.000012	0.108111
13.0	-0.016983	13.000015	0.116960
14.0	-0.019698	14.000018	0.125807
15.0	-0.022614	15.000023	0.134653
16.0	-0.025733	16.000028	0.143497
17.0	-0.029053	17.000033	0.152340
18.0	-0.032574	18.000039	0.161182
19.0	-0.036298	19.000046	0.170024
20.0	-0.040224	20.000054	0.178864
21.0	-0.044353	21.000062	0.187704
22.0	-0.048683	22.000072	0.196543
23.0	-0.053217	23.000082	0.205383
24.0	-0.057953	24.000093	0.214222
25.0	-0.062892	25.000106	0.223061
26.0	-0.068034	26.000119	0.231900
27.0	-0.073379	27.000133	0.240740
28.0	-0.078928	28.000148	0.249580
29.0	-0.084680	29.000165	0.258421
30.0	-0.090636	30.000183	0.267262
31.0	-0.096797	31.000202	0.276104
32.0	-0.103161	32.000222	0.284948
33.0	-0.109730	33.000244	0.293792
34.0	-0.116503	34.000266	0.302638
35.0	-0.123482	35.000291	0.311484
36.0	-0.130665	36.000317	0.320333
37.0	-0.138054	37.000344	0.329182
38.0	-0.145648	38.000373	0.338034
39.0	-0.153449	39.000403	0.346887
40.0	-0.161455	40.000435	0.355742
41.0	-0.169668	41.000469	0.364598
42.0	-0.178087	42.000504	0.373458
43.0	-0.186713	43.000542	0.382319
44.0	-0.195546	44.000581	0.391184
45.0	-0.204587	45.000621	0.400052
46.0	-0.213835	46.000664	0.408924
47.0	-0.223291	47.000709	0.417799
48.0	-0.232956	48.000756	0.426678
49.0	-0.242829	49.000804	0.435562
50.0	-0.252911	50.000855	0.444450
51.0	-0.263203	51.000908	0.453343
52.0	-0.273703	52.000963	0.462241
53.0	-0.284414	53.001021	0.471145
54.0	-0.295334	54.001080	0.480054
55.0	-0.306465	55.001142	0.488969
56.0	-0.317807	56.001207	0.497890
57.0	-0.329360	57.001273	0.506817
58.0	-0.341125	58.001343	0.515750
59.0	-0.353101	59.001414	0.524690
60.0	-0.365289	60.001489	0.533638
61.0	-0.377690	61.001565	0.542592
62.0	-0.390303	62.001645	0.551553
63.0	-0.403130	63.001727	0.560522
64.0	-0.416170	64.001812	0.569498
65.0	-0.429424	65.001900	0.578482
66.0	-0.442892	66.001991	0.587474
67.0	-0.456574	67.002084	0.596474
68.0	-0.470472	68.002181	0.605482
69.0	-0.484585	69.002280	0.614498
70.0	-0.498913	70.002383	0.623523
71.0	-0.513458	71.002489	0.632556
72.0	-0.528218	72.002598	0.641598
73.0	-0.543196	73.002710	0.650648
74.0	-0.558391	74.002825	0.659707
75.0	-0.573803	75.002944	0.668776
76.0	-0.589433	76.003066	0.677853
77.0	-0.605281	77.003192	0.686939
78.0	-0.621348	78.003321	0.696034
79.0	-0.637634	79.003454	0.705139
80.0	-0.654140	80.003590	0.714253
81.0	-0.670865	81.003730	0.723376
82.0	-0.687810	82.003873	0.732509
83.0	-0.704975	83.004021	0.741653
84.0	-0.722362	84.004172	0.750806
85.0	-0.739970	85.004327	0.759971
86.0	-0.757799	86.004486	0.769145
87.0	-0.775851	87.004649	0.778331
88.0	-0.794125	88.004815	0.787528
89.0	-0.812621	89.004987	0.796737
90.0	-0.831341	90.005162	0.805956
91.0	-0.850285	91.005341	0.815188
92.0	-0.869452	92.005525	0.824431
93.0	-0.888843	93.005713	0.833686
94.0	-0.908460	94.005905	0.842953
95.0	-0.928301	95.006102	0.852233
96.0	-0.948367	96.006303	0.861525
97.0	-0.968660	97.006509	0.870829
98.0	-0.989178	98.006720	0.880146
99.0	-1.009923	99.006935	0.889476
100.0	-1.030895	100.007155	0.898818
101.0	-1.052094	101.007379	0.908173
102.0	-1.073521	102.007609	0.917542
103.0	-1.095175	103.007843	0.926923
104.0	-1.117058	104.008083	0.936318
105.0	-1.139169	105.008327	0.945725
106.0	-1.161510	106.008577	0.955146
107.0	-1.184079	107.008831	0.964580
108.0	-1.206879	108.009091	0.974027
109.0	-1.229908	109.009356	0.983488
110.0	-1.253168	110.009627	0.992962
111.0	-1.276658	111.009903	1.002449
112.0	-1.300379	112.010184	1.011950
113.0	-1.324332	113.010471	1.021464
114.0	-1.348516	114.010763	1.030991
115.0	-1.372932	115.011061	1.040532
116.0	-1.397580	116.011365	1.050086
117.0	-1.422461	117.011674	1.059653
118.0	-1.447575	118.011990	1.069234
119.0	-1.472921	119.012311	1.078828
120.0	-1.498501	120.012638	1.088435
121.0	-1.524315	121.012971	1.098057
122.0	-1.550363	122.013310	1.107693
123.0	-1.576645	123.013656	1.117343
124.0	-1.603162	124.014007	1.127009
125.0	-1.629914	125.014365	1.136690
126.0	-1.656900	126.014729	1.146386
127.0	-1.684122	127.015100	1.156098
128.0	-1.711579	128.015476	1.165826
129.0	-1.739273	129.015860	1.175570
130.0	-1.767202	130.016250	1.185331
131.0	-1.795367	131.016646	1.195109
132.0	-1.823769	132.017050	1.204903
133.0	-1.852408	133.017460	1.214715
134.0	-1.881284	134.017876	1.224545
135.0	-1.910397	135.018300	1.234392
136.0	-1.939747	136.018731	1.244257
137.0	-1.969334	137.019168	1.254140
138.0	-1.999160	138.019613	1.264042
139.0	-2.029223	139.020065	1.273963
140.0	-2.059525	140.020524	1.283902
141.0	-2.090064	141.020990	1.293860
142.0	-2.120842	142.021464	1.303838
143.0	-2.151859	143.021944	1.313835
144.0	-2.183114	144.022433	1.323851
145.0	-2.214608	145.022929	1.333887
146.0	-2.246341	146.023432	1.343944
147.0	-2.278314	147.023943	1.354020
148.0	-2.310525	148.024462	1.364117
149.0	-2.342976	149.024988	1.374235
150.0	-2.375666	150.025522	1.384373
151.0	-2.408596	151.026064	1.394532
152.0	-2.441765	152.026614	1.404712
153.0	-2.475174	153.027172	1.414913
154.0	-2.508823	154.027738	1.425136
155.0	-2.542712	155.028312	1.435380
156.0	-2.576840	156.028894	1.445646
157.0	-2.611209	157.029485	1.455934
158.0	-2.645817	158.030083	1.466244
159.0	-2.680666	159.030690	1.476576
160.0	-2.715754	160.031306	1.486931
161.0	-2.751083	161.031930	1.497309
162.0	-2.786652	162.032562	1.507710
163.0	-2.822461	163.033203	1.518134
164.0	-2.858510	164.033853	1.528582
165.0	-2.894799	165.034511	1.539054
166.0	-2.931329	166.035178	1.549550
167.0	-2.968098	167.035854	1.560071
168.0	-3.005107	168.036538	1.570616
169.0	-3.042357	169.037232	1.581187
170.0	-3.079846	170.037934	1.591782
171.0	-3.117575	171.038646	1.602404
172.0	-3.155544	172.039366	1.613051
173.0	-3.193753	173.040096	1.623724
174.0	-3.232201	174.040835	1.634424
175.0	-3.270890	175.041583	1.645150
176.0	-3.309817	176.042340	1.655903
177.0	-3.348984	177.043107	1.666684
178.0	-3.388391	178.043883	1.677492
179.0	-3.428036	179.044669	1.688328
180.0	-3.467921	180.045464	1.699192
181.0	-3.508044	181.046269	1.710085
182.0	-3.548407	182.047083	1.721007
183.0	-3.589008	183.047907	1.731957
184.0	-3.629848	184.048740	1.742937
185.0	-3.670926	185.049584	1.753947
186.0	-3.712242	186.050437	1.764987
187.0	-3.753796	187.051300	1.776057
188.0	-3.795589	188.052173	1.787158
189.0	-3.837619	189.053056	1.798291
190.0	-3.879886	190.053948	1.809454
191.0	-3.922391	191.054851	1.820650
192.0	-3.965133	192.055764	1.831877
193.0	-4.008112	193.056688	1.843138
194.0	-4.051328	194.057621	1.854431
195.0	-4.094780	195.058564	1.865757
196.0	-4.138468	196.059518	1.877117
197.0	-4.182393	197.060483	1.888512
198.0	-4.226553	198.061457	1.899940
199.0	-4.270949	199.062442	1.911404
200.0	-4.315581	200.063438	1.922902
201.0	-4.360447	201.064444	1.934435
202.0	-4.405549	202.065460	1.946003
203.0	-4.450885	203.066487	1.957607
204.0	-4.496455	204.067525	1.969246
205.0	-4.542260	205.068574	1.980921
206.0	-4.588298	206.069633	1.992631
207.0	-4.634570	207.070703	2.004378
208.0	-4.681075	208.071784	2.016161
209.0	-4.727814	209.072875	2.027981
210.0	-4.774785	210.073978	2.039838
211.0	-4.821988	211.075091	2.051732
212.0	-4.869424	212.076216	2.063663
213.0	-4.917091	213.077351	2.075633
214.0	-4.964991	214.078498	2.087640
215.0	-5.013121	215.079655	2.099686
216.0	-5.061482	216.080824	2.111770
217.0	-5.110075	217.082004	2.123893
218.0	-5.158897	218.083195	2.136056
219.0	-5.207950	219.084397	2.148259
220.0	-5.257233	220.085611	2.160501
221.0	-5.306745	221.086836	2.172785
222.0	-5.356486	222.088072	2.185109
223.0	-5.406456	223.089320	2.197475
224.0	-5.456655	224.090579	2.209882
225.0	-5.507082	225.091850	2.222332
226.0	-5.557737	226.093132	2.234824
227.0	-5.608620	227.094426	2.247360
228.0	-5.659730	228.095731	2.259939
229.0	-5.711068	229.097048	2.272563
230.0	-5.762632	230.098377	2.285231
231.0	-5.814423	231.099717	2.297945
232.0	-5.866440	232.101069	2.310705
233.0	-5.918683	233.102432	2.323511
234.0	-5.971151	234.103808	2.336363
235.0	-6.023845	235.105195	2.349264
236.0	-6.076764	236.106595	2.362213
237.0	-6.129908	237.108006	2.375210
238.0	-6.183276	238.109429	2.388257
239.0	-6.236869	239.110864	2.401354
240.0	-6.290685	240.112311	2.414501
241.0	-6.344725	241.113770	2.427698
242.0	-6.398989	242.115241	2.440945
243.0	-6.453476	243.116725	2.454244
244.0	-6.508186	244.118220	2.467593
245.0	-6.563118	245.119728	2.480994
246.0	-6.618273	246.121248	2.494446
247.0	-6.673650	247.122780	2.507950
248.0	-6.729249	248.124324	2.521507
249.0	-6.785071	249.125881	2.535116
250.0	-6.841113	250.127450	2.548779
251.0	-6.897377	251.129032	2.562495
252.0	-6.953862	252.130626	2.576266
253.0	-7.010568	253.132232	2.590090
254.0	-7.067495	254.133851	2.603970
255.0	-7.124643	255.135483	2.617905
256.0	-7.182011	256.137127	2.631896
257.0	-7.239600	257.138784	2.645943
258.0	-7.297408	258.140453	2.660048
259.0	-7.355437	259.142136	2.674210
260.0	-7.413686	260.143831	2.688430
261.0	-7.472154	261.145538	2.702709
262.0	-7.530842	262.147259	2.717047
263.0	-7.589750	263.148993	2.731445
264.0	-7.648877	264.150739	2.745904
265.0	-7.708224	265.152499	2.760424
266.0	-7.767791	266.154271	2.775005
267.0	-7.827576	267.156057	2.789650
268.0	-7.887581	268.157855	2.804358
269.0	-7.947806	269.159667	2.819130
270.0	-8.008250	270.161492	2.833967
271.0	-8.068913	271.163331	2.848869
272.0	-8.129796	272.165182	2.863838
273.0	-8.190898	273.167047	2.878874
274.0	-8.252219	274.168926	2.893978
275.0	-8.313760	275.170818	2.909151
276.0	-8.375521	276.172723	2.924394
277.0	-8.437501	277.174642	2.939707
278.0	-8.499702	278.176574	2.955092
279.0	-8.562122	279.178521	2.970549
280.0	-8.624762	280.180481	2.986079
281.0	-8.687623	281.182454	3.001683
282.0	-8.750704	282.184442	3.017360
283.0	-8.814006	283.186444	3.033111
284.0	-8.877529	284.188459	3.048937
285.0	-8.941273	285.190489	3.064838
286.0	-9.005239	286.192533	3.080815
287.0	-9.069426	287.194590	3.096868
288.0	-9.133835	288.196663	3.112998
289.0	-9.198466	289.198749	3.129205
290.0	-9.263320	290.200850	3.145491
291.0	-9.328397	291.202965	3.161854
292.0	-9.393697	292.205095	3.178297
293.0	-9.459220	293.207239	3.194820
294.0	-9.524968	294.209398	3.211422
295.0	-9.590941	295.211572	3.228106
296.0	-9.657138	296.213761	3.244872
297.0	-9.723561	297.215964	3.261719
298.0	-9.790210	298.218183	3.278650
299.0	-9.857085	299.220416	3.295664
300.0	-9.924187	300.222665	3.312762
301.0	-9.991516	301.224929	3.329945
302.0	-10.059074	302.227209	3.347214
303.0	-10.126860	303.229504	3.364570
304.0	-10.194876	304.231814	3.382012
305.0	-10.263121	305.234140	3.399542
306.0	-10.331597	306.236482	3.417160
307.0	-10.400304	307.238839	3.434867
308.0	-10.469243	308.241213	3.452665
309.0	-10.538415	309.243602	3.470553
310.0	-10.607820	310.246008	3.488532
311.0	-10.677460	311.248430	3.506603
312.0	-10.747334	312.250868	3.524767
313.0	-10.817444	313.253323	3.543025
314.0	-10.887791	314.255794	3.561377
315.0	-10.958375	315.258282	3.579823
316.0	-11.029197	316.260787	3.598366
317.0	-11.100259	317.263309	3.617005
318.0	-11.171560	318.265847	3.635741
319.0	-11.243103	319.268403	3.654575
320.0	-11.314888	320.270976	3.673507
321.0	-11.386915	321.273567	3.692539
322.0	-11.459187	322.276175	3.711672
323.0	-11.531704	323.278801	3.730908
324.0	-11.604467	324.281445	3.750248
325.0	-11.677477	325.284107	3.769693
326.0	-11.750735	326.286786	3.789246
327.0	-11.824243	327.289484	3.808908
328.0	-11.898001	328.292201	3.828680
329.0	-11.972010	329.294936	3.848565
330.0	-12.046273	330.297689	3.868562
331.0	-12.120789	331.300462	3.888675
332.0	-12.195561	332.303253	3.908904
333.0	-12.270589	333.306064	3.929251
334.0	-12.345874	334.308894	3.949717
335.0	-12.421419	335.311744	3.970304
336.0	-12.497224	336.314613	3.991013
337.0	-12.573290	337.317501	4.011845
338.0	-12.649619	338.320410	4.032802
339.0	-12.726212	339.323339	4.053885
340.0	-12.803071	340.326289	4.075095
341.0	-12.880197	341.329258	4.096434
342.0	-12.957590	342.332249	4.117903
343.0	-13.035254	343.335260	4.139502
344.0	-13.113188	344.338292	4.161234
345.0	-13.191395	345.341346	4.183098
346.0	-13.269876	346.344421	4.205097
347.0	-13.348632	347.347517	4.227231
348.0	-13.427665	348.350635	4.249502
349.0	-13.506977	349.353776	4.271909
350.0	-13.586567	350.356938	4.294455
351.0	-13.666440	351.360123	4.317139
352.0	-13.746594	352.363330	4.339963
353.0	-13.827033	353.366560	4.362928
354.0	-13.907758	354.369813	4.386033
355.0	-13.988770	355.373089	4.409281
356.0	-14.070071	356.376389	4.432670
357.0	-14.151662	357.379712	4.456203
358.0	-14.233545	358.383058	4.479879
359.0	-14.315721	359.386429	4.503698
360.0	-14.398191	360.389824	4.527662
361.0	-14.480959	361.393243	4.551770
362.0	-14.564024	362.396687	4.576023
363.0	-14.647388	363.400156	4.600420
364.0	-14.731053	364.403650	4.624964
365.0	-14.815021	365.407169	4.649659
366.0	-14.899292	366.410714	4.674507
367.0	-14.983869	367.414284	4.699511
368.0	-15.068753	368.417880	4.724676
369.0	-15.153945	369.421502	4.750003
370.0	-15.239447	370.425151	4.775495
371.0	-15.325260	371.428826	4.801157
372.0	-15.411386	372.432528	4.826989
373.0	-15.497826	373.436257	4.852995
374.0	-15.584581	374.440013	4.879178
375.0	-15.671653	375.443797	4.905540
376.0	-15.759043	376.447608	4.932082
377.0	-15.846752	377.451447	4.958809
378.0	-15.934783	378.455314	4.985720
379.0	-16.023135	379.459210	5.012820
380.0	-16.111810	380.463134	5.040109
381.0	-16.200810	381.467087	5.067589
382.0	-16.290136	382.471068	5.095262
383.0	-16.379788	383.475079	5.123130
384.0	-16.469768	384.479119	5.151193
385.0	-16.560077	385.483189	5.179454
386.0	-16.650716	386.487288	5.207913
387.0	-16.741686	387.491417	5.236572
388.0	-16.832987	388.495576	5.265431
389.0	-16.924621	389.499766	5.294491
390.0	-17.016589	390.503986	5.323752
391.0	-17.108890	391.508237	5.353216
392.0	-17.201527	392.512519	5.382882
393.0	-17.294499	393.516831	5.412751
394.0	-17.387807	394.521175	5.442822
395.0	-17.481451	395.525550	5.473096
396.0	-17.575433	396.529957	5.503571
397.0	-17.669752	397.534395	5.534248
398.0	-17.764408	398.538865	5.565126
399.0	-17.859403	399.543366	5.596204
400.0	-17.954735	400.547900	5.627481
401.0	-18.050405	401.552466	5.658956
402.0	-18.146414	402.557065	5.690627
403.0	-18.242760	403.561695	5.722492
404.0	-18.339443	404.566358	5.754551
405.0	-18.436464	405.571054	5.786800
406.0	-18.533822	406.575782	5.819238
407.0	-18.631516	407.580542	5.851863
408.0	-18.729546	408.585336	5.884671
409.0	-18.827910	409.590162	5.917660
410.0	-18.926609	410.595021	5.950827
411.0	-19.025640	411.599913	5.984168
412.0	-19.125003	412.604837	6.017680
413.0	-19.224697	413.609794	6.051360
414.0	-19.324720	414.614784	6.085202
415.0	-19.425071	415.619807	6.119204
416.0	-19.525748	416.624862	6.153360
417.0	-19.626749	417.629949	6.187666
418.0	-19.728072	418.635069	6.222116
419.0	-19.829715	419.640222	6.256706
420.0	-19.931676	420.645406	6.291430