<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-24 -297 12:30:00.000"
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="14.0">
<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: F2x cusp not found, Multiple candidates for F2o cusp, One of F2 cusps was derived from the other, Unidentified traces above foF2</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" >
2026.10.24 (297) 12:30:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.40" 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">
FF202629710241230009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="26" >
<URSI ID="00" Val="10.400" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.812" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="29.241" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="9.850" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="9.850" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.750" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="430.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="430.000" 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="0.100" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.900" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="430.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Custom Name="dlt foF2" Val="0.000" Description="Adjustment to the scaled foF2 during profile inversion" Units="MHz" />
<Modeled Name="foEp" Val="3.208" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="9.900" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="9.900" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.275" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="290.461" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="197.467" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.014" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="124.602" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="38.697" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="67.787" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="138.170" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.770" 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" >
9.85 9.9 9.95 10.0 10.05 10.1 10.15 10.2 10.25 10.3 10.35 10.4
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
435.000 430.000 440.000 440.000 445.000 450.000 460.000 465.000 470.000 485.000 495.000 513.683
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 60 57 60 60 57 54 60 57 48 57 51
</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
</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" >
89.511 90.0 95.0 100.0 105.0 110.0 112.308 114.615 115.0 116.923 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 290.461 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.239 2.157 2.776 3.104 3.208 3.086 3.086 3.106 3.208 3.354 3.58 3.804 4.033 4.269 4.515 4.772 5.038 5.313 5.592 5.874 6.155 6.432 6.704 6.97 7.229 7.48 7.725 7.961 8.191 8.414 8.629 8.837 9.038 9.231 9.416 9.591 9.755 9.907 10.044 10.163 10.261 10.335 10.382 10.4 10.4 10.396 10.38 10.355 10.321 10.277 10.225 10.165 10.097 10.023 9.942 9.855 9.763 9.665 9.563 9.456 9.346 9.233 9.116 8.997 8.875 8.751 8.625 8.498 8.37 8.241 8.111 7.98 7.849 7.718 7.587 7.457 7.326 7.197 7.067 6.939 6.812 6.685 6.56 6.435 6.312 6.191 6.07 5.951 5.834 5.718 5.603 5.491 5.379 5.27 5.162 5.056 4.951 4.848 4.747 4.648 4.55 4.454 4.36 4.267 4.176 4.087 3.999 3.913 3.828 3.746 3.664 3.585 3.507 3.43 3.355 3.282 3.21 3.139 3.07 3.002 2.936 2.871 2.807 2.745 2.684 2.624 2.566 2.509 2.453 2.398 2.345 2.292 2.241 2.191 2.141 2.093 2.046 2.0 1.955 1.911 1.868 1.826 1.785 1.745 1.706 1.667 1.629 1.593 1.557 1.522 1.487 1.453 1.421 1.388 1.357 1.326 1.296 1.267 1.238 1.21 1.183 1.156 1.13 1.104 1.079 1.054 1.03 1.007 0.984 0.962 0.94 0.919 0.898 0.877 0.857 0.838 0.819 0.8 0.782 0.764 0.747 0.73 0.713 0.697 0.681 0.666 0.651

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.208" PeakHeight="110.0" Num="3" Error="0.0">
-30.364 12.95 -3.075
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.208" EndFrequency="10.4" PeakHeight="290.461" Num="5" zHalfNm="197.467" Error="3.655">
-166.855 -11.48 7.484 -4.217 1.53
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="6.923" Depth="0.122"/>
<TopsideChapman PeakHeight="290.461" PeakDensity="1341935.5" PeakScaleHeight="67.787" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
