<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-21 -294 09:40:00.000"
URSICode="SAA0K"
StationName="SaoLuis"
GeoLatitude="-2.6"
GeoLongitude="315.8"
Source="Ionosonde"
SourceType="DPS-4"
ScalerType="auto">
<SystemInfo UMLStationID="903">
<FrequencyStepping StartFrequency="1.0" StopFrequency="12.0">
<LinearStepping Step="0.05" Units="MHz" />
</FrequencyStepping>
<RangeStepping StartRange="80.0" StopRange="1360.0" >
<LinearStepping Step="5.0" Units="km" />
</RangeStepping>
<AutoScaler Name="Artist5" Version="500200" ArtistFlags="2 2 0 0 0 0 0 0 0 44 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 45% PACIFIC flags: F2o cusp not found, Multiple candidates for F2x cusp, One of F2 cusps was derived from the other, F2O model cusp does not fit trace</Comments>
<ContactPerson>
<Name>Dr. Mangalathayil Ali Abdu</Name>
<Affiliation>INPE, Division of Aeronomy</Affiliation>
<Address>Av dos Astronautas, 1.758 Jd. Granja - CEP: 12227-010 Sao Jose dos Campos - SP Brasil</Address>
<Email>maabdu@dae.inpe.br</Email>
</ContactPerson>
<StartTime Format="yyyy.MM.dd (DDD) HH:mm:ss" TimeZone="Coordinated Universal Time" >
2026.10.21 (294) 09:40:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.39" Model="IGRF 3.0" Altitude="300"/>
<DeclinationAngle Val="-19.74" Model="IGRF 3.0" Altitude="300"/>
<SunSpotNumber Val="-1.0" Status="predicted"/>
</SolarTerrestrialData>
<DigisondePreface Format="FF">
FF202629410210940009039031101000005012000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="9.200" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.007" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="27.664" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="7.100" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="7.100" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.700" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="295.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="295.000" 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="0.150" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="8.150" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="340.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="2.184" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="7.100" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="7.100" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="293.688" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="214.350" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.009" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="109.709" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="26.413" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="58.959" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="115.390" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.950" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="43">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
7.1 7.15 7.2 7.25 7.3 7.35 7.4 7.45 7.5 7.55 7.6 7.65 7.7 7.75 7.8 7.85 7.9 7.95 8.0 8.05 8.1 8.15 8.2 8.25 8.3 8.35 8.4 8.45 8.5 8.55 8.6 8.65 8.7 8.75 8.8 8.85 8.9 8.95 9.0 9.05 9.1 9.15 9.2
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
295.000 295.000 300.000 300.000 300.000 300.000 300.000 305.000 305.000 305.000 305.000 315.000 320.000 320.000 320.000 320.000 330.000 335.000 340.000 340.000 340.000 340.000 345.678 351.356 357.034 362.712 368.390 374.068 379.746 385.424 391.102 396.780 402.458 408.137 410.418 413.219 416.740 421.301 430.000 435.000 450.000 470.000 521.101
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 60 0 0 0 69 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 1.171875 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 1.171875 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 1.171875 0.390625 0.390625 1.171875 0.390625 1.171875 1.171875 -0.390625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="188">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.711 90.0 95.0 100.0 105.0 110.0 115.0 117.214 120.0 124.429 125.0 130.0 131.643 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 293.688 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.225 1.465 1.891 2.113 2.184 2.123 2.055 2.055 2.055 2.065 2.155 2.184 2.323 2.529 2.742 2.965 3.198 3.444 3.702 3.971 4.25 4.535 4.825 5.117 5.409 5.699 5.985 6.266 6.541 6.809 7.07 7.322 7.564 7.796 8.017 8.224 8.417 8.593 8.751 8.888 9.003 9.093 9.156 9.192 9.2 9.2 9.19 9.168 9.135 9.092 9.038 8.975 8.904 8.825 8.738 8.645 8.546 8.442 8.333 8.219 8.102 7.981 7.857 7.731 7.603 7.474 7.343 7.211 7.078 6.945 6.812 6.679 6.546 6.414 6.282 6.151 6.022 5.893 5.766 5.64 5.515 5.393 5.272 5.152 5.034 4.919 4.805 4.692 4.582 4.474 4.368 4.264 4.161 4.061 3.963 3.866 3.772 3.68 3.589 3.501 3.414 3.33 3.247 3.166 3.087 3.009 2.934 2.86 2.788 2.717 2.648 2.581 2.516 2.452 2.389 2.328 2.269 2.211 2.154 2.099 2.045 1.992 1.941 1.891 1.843 1.795 1.749 1.704 1.66 1.617 1.575 1.534 1.494 1.456 1.418 1.381 1.345 1.31 1.276 1.243 1.211 1.179 1.149 1.119 1.09 1.061 1.034 1.007 0.981 0.955 0.93 0.906 0.882 0.859 0.837 0.815 0.794 0.773 0.753 0.733 0.714 0.696 0.677 0.66 0.643 0.626 0.609 0.594 0.578 0.563 0.548 0.534 0.52 0.506 0.493 0.48 0.468 0.455 0.444 0.432 0.421 0.41 0.399 0.389 0.378 0.369 0.359

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.184" PeakHeight="110.0" Num="3" Error="0.0">
-29.332 11.476 -2.433
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.184" EndFrequency="9.2" PeakHeight="293.688" Num="5" zHalfNm="214.35" Error="1.788">
-160.033 -3.699 2.764 -1.803 0.726
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="21.643" Depth="0.129"/>
<TopsideChapman PeakHeight="293.688" PeakDensity="1050124.1" PeakScaleHeight="58.959" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
