<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-04-20 -110 06:55:00.000"
URSICode="SMK29"
StationName="Santa Maria"
GeoLatitude="-29.69"
GeoLongitude="307.81"
Source="Ionosonde"
SourceType="DPS-4D"
ScalerType="auto">
<SystemInfo UMLStationID="129">
<FrequencyStepping StartFrequency="2.0" StopFrequency="15.0">
<LinearStepping Step="0.025" Units="MHz" />
</FrequencyStepping>
<RangeStepping StartRange="80.0" StopRange="1360.0" >
<LinearStepping Step="2.5" Units="km" />
</RangeStepping>
<AutoScaler Name="Artist5" Version="500200" ArtistFlags="2 2 0 0 0 0 0 0 0 22 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.49 Confidence: 70% PACIFIC flags: F2 cusps do not match</Comments>
<StartTime Format="yyyy.MM.dd (DDD) HH:mm:ss" TimeZone="Coordinated Universal Time" >
2026.04.20 (110) 06:55:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.56" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-41.20" Model="IGRF 3.0" Altitude="300"/>
<DeclinationAngle Val="-15.98" Model="IGRF 3.0" Altitude="300"/>
<SunSpotNumber Val="78.74007" Status="predicted"/>
</SolarTerrestrialData>
<DigisondePreface Format="FF">
FF202611004200655001291297002000002515000000001107301000080205120000B05040001
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="2.500" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.698" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="9.246" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.225" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.225" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="2.675" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="247.500" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="247.500" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="90" Val="110.000" Name="hmE" Units="km" QL="/" DL="/" />
<URSI ID="83" Val="20.000" Name="yE" Units="km" QL="/" DL="/" />
<URSI ID="86" Val="0.050" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="2.400" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="272.500" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.225" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.225" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="244.374" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="228.288" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="3.030" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="22.898" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="0.417" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="12.169" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="23.050" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="2.110" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="12">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.225 2.25 2.275 2.3 2.325 2.35 2.375 2.4 2.425 2.45 2.475 2.5
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
247.500 250.000 253.750 257.500 261.250 265.000 268.750 272.500 280.000 286.532 293.690 301.570
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
66 66 0 0 0 0 0 63 72 69 0 60
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
1.5625 1.5625 7.8125 -1.5625 -1.5625 -1.5625 -1.5625 1.5625 1.5625 -1.5625 7.8125 -1.5625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.32" Type="vertical" >
<Tabulated Num="328">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 94.0 95.0 96.0 97.0 98.0 99.0 100.0 101.0 102.0 103.0 104.0 105.0 106.0 107.0 108.0 109.0 110.0 111.0 112.0 113.0 114.0 115.0 116.0 117.0 118.0 119.0 120.0 121.0 122.0 123.0 124.0 125.0 126.0 127.0 128.0 129.0 130.0 131.0 132.0 133.0 134.0 135.0 136.0 137.0 138.0 139.0 140.0 141.0 142.0 142.08333 143.0 144.0 145.0 146.0 147.0 148.0 149.0 150.0 151.0 152.0 153.0 154.0 155.0 156.0 157.0 158.0 159.0 160.0 161.0 162.0 163.0 164.0 165.0 166.0 167.0 168.0 169.0 170.0 171.0 172.0 173.0 174.0 174.16667 175.0 176.0 177.0 178.0 179.0 180.0 181.0 182.0 183.0 184.0 185.0 186.0 187.0 188.0 189.0 190.0 191.0 192.0 193.0 194.0 195.0 196.0 197.0 198.0 199.0 200.0 201.0 202.0 203.0 204.0 205.0 206.0 206.25 207.0 208.0 209.0 210.0 211.0 212.0 213.0 214.0 215.0 216.0 217.0 218.0 219.0 220.0 221.0 222.0 223.0 224.0 225.0 226.0 227.0 228.0 229.0 230.0 231.0 232.0 233.0 234.0 235.0 236.0 237.0 238.0 239.0 240.0 241.0 242.0 243.0 244.0 244.374 245.0 246.0 247.0 248.0 249.0 250.0 251.0 252.0 253.0 254.0 255.0 256.0 257.0 258.0 259.0 260.0 261.0 262.0 263.0 264.0 265.0 266.0 267.0 268.0 269.0 270.0 271.0 272.0 273.0 274.0 275.0 276.0 277.0 278.0 279.0 280.0 281.0 282.0 283.0 284.0 285.0 286.0 287.0 288.0 289.0 290.0 291.0 292.0 293.0 294.0 295.0 296.0 297.0 298.0 299.0 300.0 301.0 302.0 303.0 304.0 305.0 306.0 307.0 308.0 309.0 310.0 311.0 312.0 313.0 314.0 315.0 316.0 317.0 318.0 319.0 320.0 321.0 322.0 323.0 324.0 325.0 326.0 327.0 328.0 329.0 330.0 331.0 332.0 333.0 334.0 335.0 336.0 337.0 338.0 339.0 340.0 341.0 342.0 343.0 344.0 345.0 346.0 347.0 348.0 349.0 350.0 351.0 352.0 353.0 354.0 355.0 356.0 357.0 358.0 359.0 360.0 361.0 362.0 363.0 364.0 365.0 366.0 367.0 368.0 369.0 370.0 371.0 372.0 373.0 374.0 375.0 376.0 377.0 378.0 379.0 380.0 381.0 382.0 383.0 384.0 385.0 386.0 387.0 388.0 389.0 390.0 391.0 392.0 393.0 394.0 395.0 396.0 397.0 398.0 399.0 400.0 401.0 402.0 403.0 404.0 405.0 406.0 407.0 408.0 409.0 410.0 411.0 412.0 413.0 414.0 415.0 416.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.21213934 0.23390245 0.2526677 0.26895854 0.28319094 0.29565945 0.30659118 0.31614733 0.32445762 0.331616 0.33769703 0.34275886 0.34684667 0.3499937 0.352225 0.3535571 0.354 0.3538872 0.35354906 0.35298675 0.3521277 0.3511249 0.34983355 0.34833378 0.34655926 0.3445913 0.34229675 0.3398302 0.33706498 0.33401984 0.33071515 0.327109 0.32322994 0.31904808 0.31454307 0.3097052 0.30453598 0.29904887 0.29310012 0.2867813 0.2800439 0.2727352 0.26502842 0.25670934 0.24776544 0.23820302 0.22786881 0.21668318 0.20459439 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.204 0.2088 0.2136 0.2184 0.2232 0.228 0.2328 0.2376 0.2424 0.2472 0.252 0.2568 0.2616 0.2664 0.2712 0.276 0.2808 0.2856 0.2904 0.2952 0.3 0.3048 0.3096 0.3144 0.3192 0.324 0.3288 0.3336 0.3384 0.3432 0.348 0.3528 0.354 0.38342988 0.42473686 0.46840426 0.5144388 0.5628766 0.6137905 0.6672301 0.7232737 0.7819819 0.843364 0.9074697 0.9742463 1.0436474 1.1155584 1.1897702 1.2660816 1.3441429 1.4235799 1.5039221 1.5846589 1.6652205 1.7449969 1.8233589 1.8996999 1.9733909 2.0438776 2.1106088 2.1731386 2.2310138 2.2839031 2.3314776 2.3734848 2.409712 2.439999 2.4642096 2.482249 2.4940476 2.499559 2.5 2.4993608 2.4957635 2.489149 2.4796917 2.467567 2.4529483 2.436008 2.416915 2.3958342 2.3729265 2.3483474 2.3222473 2.2947705 2.266055 2.2362335 2.205431 2.1737673 2.1413553 2.1083012 2.0747056 2.0406628 2.0062606 1.9715818 1.936703 1.9016955 1.8666254 1.8315542 1.7965379 1.7616286 1.726874 1.6923175 1.6579986 1.6239536 1.5902148 1.5568118 1.5237709 1.4911156 1.4588667 1.4270426 1.3956596 1.3647313 1.3342701 1.3042859 1.2747871 1.2457806 1.2172718 1.1892648 1.1617624 1.1347662 1.1082772 1.0822948 1.056818 1.0318449 1.0073729 0.98339856 0.9599183 0.9369277 0.91442186 0.8923956 0.87084335 0.84975916 0.82913685 0.80897 0.78925186 0.76997566 0.7511344 0.732721 0.7147281 0.69714856 0.67997503 0.6632 0.6468162 0.63081604 0.61519223 0.5999374 0.5850441 0.570505 0.5563129 0.5424606 0.5289409 0.51574683 0.5028712 0.49030733 0.47804826 0.46608734 0.4544179 0.44303346 0.43192756 0.42109388 0.41052625 0.4002185 0.39016467 0.38035887 0.3707953 0.36146834 0.35237235 0.34350193 0.3348517 0.32641646 0.31819108 0.3101705 0.3023498 0.29472423 0.28728902 0.28003958 0.2729714 0.26608005 0.2593613 0.25281084 0.24642459 0.24019854 0.23412873 0.22821134 0.2224426 0.21681885 0.2113365 0.20599206 0.2007821 0.19570331 0.19075242 0.18592626 0.1812217 0.17663573 0.1721654 0.16780782 0.16356017 0.15941972 0.15538375 0.1514497 0.14761497 0.1438771 0.14023367 0.13668227 0.13322063 0.12984647 0.1265576 0.123351894 0.12022725 0.117181614 0.11421301 0.1113195 0.10849919 0.10575023 0.10307084 0.100459255 0.09791376 0.09543269 0.09301443 0.09065738 0.088360004 0.0861208 0.08393829 0.08181105 0.07973767 0.077716805 0.07574712 0.07382732 0.07195615 0.070132375 0.06835479 0.06662225 0.0649336 0.06328772 0.061683547 0.060120016 0.0585961 0.057110798 0.05566313 0.054252148 0.05287692 0.051536538 0.050230123

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.354" PeakHeight="110.0" Num="3" Error="0.0">
-18.791 2.435 -0.142
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.354" EndFrequency="2.5" PeakHeight="244.374" Num="5" zHalfNm="228.288" Error="0.895">
-38.321 0.346 -0.37 0.271 -0.05
</ShiftedChebyshev>
</ShiftedChebyshevList>
<QuasiParabolicList Num="8" EarthRadius="6370.0">
<QuasiParabolic ID="0" StartDistance="6460.0205" EndDistance="6480.001" A="-5.5027394E11" B="1.69837632E8" C="-13104.63" Error="0.0016"/>
<QuasiParabolic ID="1" StartDistance="6480.0" EndDistance="6512.083" A="-1.47549225E11" B="4.5539884E7" C="-3513.7546" Error="0.00163"/>
<QuasiParabolic ID="2" StartDistance="6512.083" EndDistance="6544.167" A="0.0" B="-877.9304" C="0.17484184" Error="0.0172"/>
<QuasiParabolic ID="3" StartDistance="6544.167" EndDistance="6572.0" A="5.357953E10" B="-1.6448171E7" C="1262.3555" Error="0.0172"/>
<QuasiParabolic ID="4" StartDistance="6572.0" EndDistance="6576.0" A="1.07322127E12" B="-3.26746944E8" C="24869.99" Error="0.0382"/>
<QuasiParabolic ID="5" StartDistance="6576.0" EndDistance="6592.0" A="1.00908516E13" B="-3.0693353E9" C="233400.12" Error="0.069"/>
<QuasiParabolic ID="6" StartDistance="6592.0" EndDistance="6603.0" A="1.25927393E13" B="-3.8284032E9" C="290975.06" Error="0.0334"/>
<QuasiParabolic ID="7" StartDistance="6603.0" EndDistance="6614.374" A="-2.71771752E13" B="8.2176108E9" C="-621187.1" Error="0.0108"/>
</QuasiParabolicList>
<ProfileValley Model="ULCAR" Width="96.25" Depth="0.154"/>
<TopsideChapman PeakHeight="244.374" PeakDensity="77543.42" PeakScaleHeight="12.169" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
