<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-24 -297 16:10:00.000"
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 33 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 65% PACIFIC flags: F2x cusp not found, Multiple candidates for F2o cusp, One of F2 cusps was derived from the other</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) 16:10:00</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">
FF202629710241610009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="10.250" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.568" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="26.327" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="9.350" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="9.350" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.450" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="475.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="475.000" 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="0.050" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.900" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="510.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="3.310" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="9.350" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="9.350" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.323" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="329.436" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="214.937" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.410" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="148.498" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="44.998" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="80.579" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="176.110" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.510" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="19">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
9.35 9.4 9.45 9.5 9.55 9.6 9.65 9.7 9.75 9.8 9.85 9.9 9.95 10.0 10.05 10.1 10.15 10.2 10.25
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
475.000 480.000 480.000 480.000 485.000 495.000 500.000 505.000 506.250 507.500 508.750 510.000 515.000 525.000 533.074 541.881 551.523 562.127 573.843
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 45 54 48 48 51 51 45 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 -1.171875 2.734375 -0.390625 -0.390625 0.390625 -0.390625 0.390625 2.734375 -2.734375 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" >
89.495 90.0 95.0 100.0 105.0 110.0 111.882 113.764 115.0 115.646 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 329.436 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.24 2.227 2.865 3.202 3.31 3.187 3.187 3.268 3.31 3.477 3.654 3.828 4.002 4.181 4.366 4.559 4.76 4.968 5.183 5.401 5.622 5.841 6.059 6.271 6.479 6.68 6.876 7.066 7.25 7.429 7.603 7.773 7.938 8.1 8.258 8.413 8.565 8.714 8.861 9.006 9.148 9.287 9.423 9.556 9.685 9.809 9.925 10.03 10.121 10.192 10.237 10.25 10.25 10.245 10.233 10.214 10.188 10.156 10.118 10.073 10.024 9.968 9.909 9.844 9.775 9.702 9.625 9.545 9.461 9.374 9.285 9.193 9.098 9.002 8.903 8.803 8.701 8.598 8.494 8.388 8.282 8.175 8.067 7.96 7.851 7.743 7.634 7.526 7.417 7.309 7.201 7.093 6.986 6.88 6.774 6.668 6.564 6.46 6.357 6.254 6.153 6.053 5.953 5.855 5.758 5.661 5.566 5.472 5.379 5.287 5.196 5.107 5.018 4.931 4.845 4.76 4.676 4.594 4.512 4.432 4.353 4.275 4.199 4.123 4.049 3.976 3.904 3.833 3.763 3.695 3.627 3.561 3.495 3.431 3.368 3.306 3.245 3.185 3.126 3.068 3.011 2.955 2.9 2.846 2.793 2.741 2.689 2.639 2.59 2.541 2.493 2.447 2.401 2.355 2.311 2.267 2.225 2.183 2.141 2.101 2.061 2.022 1.984 1.946 1.91 1.873 1.838 1.803 1.769 1.735 1.702 1.67 1.638 1.607 1.576 1.546 1.517 1.488 1.459 1.432 1.404 1.378 1.351 1.325 1.3 1.275 1.251

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.31" PeakHeight="110.0" Num="3" Error="0.0">
-30.443 13.065 -3.127
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.31" EndFrequency="10.25" PeakHeight="329.436" Num="5" zHalfNm="214.937" Error="6.181">
-195.415 -31.114 19.723 -10.246 3.262
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="5.646" Depth="0.123"/>
<TopsideChapman PeakHeight="329.436" PeakDensity="1303505.0" PeakScaleHeight="80.579" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
