The detail information of Tracker-parameters can be found at 
https://indico.ihep.ac.cn/event/16344/contribution/0/material/slides/0.pdf
helix initial parameters (D0, z0, theta, phi, Pt) = (0, 0, 85°, 0, Pt)
Pt    sigma(D0)          sigma(Pt)/Pt
1.0   11.533394954012781 0.00021810478193905774
1.12  10.486655646922054 0.00033514415938354505
1.25  9.590112033287868  0.00043392272619742066
1.41  8.724058469306089  0.0005252132250836069
1.58  8.004807447979399  0.0005969206550068161
1.77  7.371891625923836  0.00065672096369789
1.99  6.797064309006038  0.0007085973874301062
2.23  6.305706451727128  0.0007516343215788225
2.51  5.857558895771745  0.0007906359881514605
2.81  5.482312903807572  0.0008240440625635271
3.16  5.140238601032853  0.0008562228877796143
3.54  4.850343117960683  0.0008859604188923802
3.98  4.587914079043268  0.0009160925304547184
4.46  4.363311851639552  0.0009454562912438577
5.01  4.159778024546458  0.0009759023179498496
5.62  3.9795165178706973 0.0010065746307139495
6.3   3.8164744868736187 0.0010375680136737483
7.07  3.6643048310907314 0.0010691079340242589
7.94  3.520422873472042  0.0011007220363604367
8.91  3.384112512217831  0.0011315668643337021
10.0  3.25235977933527   0.0011615076507430532
11.22 3.124573678045961  0.0011901443467840199
12.58 3.0007311858969596 0.0012172623623198141
14.12 2.8790371018398604 0.0012433265668107324
15.84 2.761719984491402  0.0012682025518367384
17.78 2.6483970814881084 0.001292556061037029
19.95 2.54091792451689   0.0013167686633957037
22.38 2.4399788520037027 0.0013416120482390985
25.11 2.3460572290540296 0.001368045140952239
28.18 2.259779852763064  0.0013971176247803499
31.62 2.1819131025691183 0.0014298905868706537
35.48 2.1125196615649324 0.001467718607564928
39.81 2.051552597363031  0.0015120633985823233
44.66 1.9987683267518686 0.0015644851484760381
50.11 1.9534919524565648 0.0016269719092822446
56.23 1.91513756326488   0.0017015109279579952
63.09 1.8830357471049683 0.0017901449764346929
70.79 1.8563692642236915 0.0018953400356071176
79.43 1.8343980735054193 0.0020195963306660295
89.12 1.816422489829845  0.0021655442378917945
100.0 1.801781219263091  0.002336244426641129