<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-24 -297 17:20:00.000"
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) 17:20:00</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">
FF202629710241720009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="26" >
<URSI ID="00" Val="9.800" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.705" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="26.511" 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="10.100" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="470.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="470.000" 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="9.600" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="480.000" 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="3.117" 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="4.231" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="296.015" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="199.606" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.930" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="128.033" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="35.379" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="69.636" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="144.260" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.710" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="10">
<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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
470.000 470.000 475.000 475.000 485.000 480.000 485.000 489.716 495.983 504.716
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 60 54 63 48 63 60 60 60 57
</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
</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" >
89.526 90.0 95.0 100.0 105.0 110.0 112.703 115.0 115.405 118.108 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 296.015 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.238 2.096 2.698 3.016 3.117 2.995 2.995 2.995 3.117 3.203 3.415 3.619 3.823 4.034 4.253 4.482 4.721 4.969 5.223 5.48 5.737 5.992 6.241 6.484 6.719 6.947 7.168 7.382 7.589 7.79 7.984 8.173 8.356 8.533 8.704 8.869 9.027 9.176 9.316 9.444 9.558 9.654 9.729 9.778 9.799 9.8 9.797 9.784 9.763 9.733 9.695 9.649 9.596 9.536 9.47 9.397 9.32 9.237 9.149 9.058 8.962 8.863 8.76 8.655 8.546 8.436 8.324 8.21 8.094 7.977 7.859 7.74 7.621 7.501 7.381 7.261 7.141 7.021 6.901 6.782 6.664 6.546 6.429 6.313 6.198 6.084 5.971 5.859 5.748 5.638 5.53 5.424 5.318 5.214 5.112 5.01 4.911 4.813 4.716 4.621 4.527 4.435 4.344 4.255 4.168 4.082 3.997 3.914 3.832 3.752 3.674 3.596 3.521 3.446 3.373 3.302 3.232 3.163 3.095 3.029 2.964 2.901 2.838 2.777 2.718 2.659 2.602 2.545 2.49 2.436 2.384 2.332 2.281 2.231 2.183 2.135 2.089 2.043 1.999 1.955 1.912 1.87 1.829 1.789 1.75 1.712 1.674 1.637 1.601 1.566 1.532 1.498 1.465 1.433 1.401 1.37 1.34 1.311 1.282 1.254 1.226 1.199 1.172 1.146 1.121 1.096 1.072 1.049 1.025 1.003 0.981 0.959 0.938 0.917 0.897 0.877 0.857 0.838 0.82 0.802 0.784 0.767 0.75 0.733 0.717 0.701 0.685

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.117" PeakHeight="110.0" Num="3" Error="0.0">
-30.291 12.843 -3.026
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.117" EndFrequency="9.8" PeakHeight="296.015" Num="5" zHalfNm="199.606" Error="5.111">
-169.138 -15.069 9.827 -5.56 2.033
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="8.108" Depth="0.122"/>
<TopsideChapman PeakHeight="296.015" PeakDensity="1191563.2" PeakScaleHeight="69.636" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
