<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-24 -297 17:50:00.000"
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) 17:50:00</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">
FF202629710241750009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="26" >
<URSI ID="00" Val="10.600" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.609" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="27.655" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="9.750" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="9.750" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.900" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="465.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="465.000" 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="0.250" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.950" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="475.000" 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="2.994" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="9.750" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="9.750" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.171" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="330.234" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="223.101" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="10.097" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="143.081" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="45.911" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="76.972" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="161.400" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.650" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="18">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
9.75 9.8 9.85 9.9 9.95 10.0 10.05 10.1 10.15 10.2 10.25 10.3 10.35 10.4 10.45 10.5 10.55 10.6
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
465.000 470.000 475.000 475.000 475.000 480.000 485.000 490.000 494.453 499.381 504.867 511.010 517.935 525.803 534.820 545.257 557.478 571.984
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 57 51 57 57 57 54 54 54 54 54 51 51 51 48 45 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 0.390625 1.953125
</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" >
89.547 90.0 95.0 100.0 105.0 110.0 113.245 115.0 116.49 119.735 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 330.234 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.237 2.013 2.591 2.897 2.994 2.872 2.872 2.872 2.994 3.005 3.201 3.387 3.57 3.757 3.95 4.15 4.359 4.577 4.804 5.039 5.278 5.521 5.764 6.006 6.245 6.48 6.709 6.933 7.152 7.366 7.574 7.777 7.975 8.169 8.359 8.545 8.726 8.904 9.078 9.247 9.413 9.574 9.73 9.879 10.021 10.154 10.275 10.383 10.473 10.541 10.584 10.6 10.6 10.596 10.584 10.563 10.535 10.5 10.458 10.409 10.354 10.293 10.227 10.155 10.079 9.998 9.913 9.824 9.732 9.636 9.537 9.436 9.332 9.225 9.117 9.007 8.895 8.783 8.668 8.553 8.437 8.321 8.204 8.087 7.969 7.852 7.734 7.617 7.5 7.383 7.267 7.151 7.036 6.922 6.809 6.696 6.584 6.474 6.364 6.255 6.148 6.041 5.936 5.832 5.729 5.628 5.527 5.428 5.331 5.234 5.139 5.045 4.953 4.862 4.772 4.684 4.597 4.511 4.427 4.344 4.262 4.182 4.103 4.025 3.948 3.873 3.799 3.727 3.655 3.585 3.516 3.448 3.382 3.316 3.252 3.189 3.127 3.066 3.007 2.948 2.89 2.834 2.778 2.724 2.671 2.618 2.567 2.516 2.467 2.418 2.37 2.324 2.278 2.233 2.189 2.145 2.103 2.061 2.02 1.98 1.941 1.902 1.865 1.828 1.791 1.756 1.721 1.686 1.653 1.62 1.588 1.556 1.525 1.495 1.465 1.436 1.407 1.379 1.351 1.324 1.298 1.272 1.246 1.222 1.197 1.173 1.15

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.994" PeakHeight="110.0" Num="3" Error="0.0">
-30.19 12.695 -2.958
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.994" EndFrequency="10.6" PeakHeight="330.234" Num="5" zHalfNm="223.101" Error="5.191">
-197.874 -21.563 13.913 -7.573 2.598
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="9.735" Depth="0.122"/>
<TopsideChapman PeakHeight="330.234" PeakDensity="1394044.6" PeakScaleHeight="76.972" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
