<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-25 -298 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 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" >
2026.10.25 (298) 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">
FF202629810251610009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="10.450" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.570" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="26.859" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="10.100" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="10.100" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.750" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="510.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="510.000" 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="10.100" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="510.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="3.308" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="10.100" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="10.100" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.323" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="316.756" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="207.106" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.410" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="148.047" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="46.401" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="80.951" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="161.350" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.870" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="8">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
10.1 10.15 10.2 10.25 10.3 10.35 10.4 10.45
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
510.000 515.000 525.000 530.000 540.000 553.744 570.902 592.929
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 48 51 51 48 48 45 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
</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" >
89.496 90.0 95.0 100.0 105.0 110.0 111.887 113.775 115.0 115.662 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 316.756 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.24 2.225 2.863 3.2 3.308 3.185 3.185 3.265 3.308 3.482 3.679 3.877 4.078 4.284 4.496 4.714 4.939 5.169 5.404 5.642 5.882 6.123 6.363 6.601 6.836 7.067 7.295 7.518 7.735 7.948 8.155 8.357 8.553 8.742 8.925 9.102 9.271 9.433 9.586 9.73 9.864 9.987 10.099 10.197 10.28 10.348 10.399 10.433 10.449 10.45 10.448 10.44 10.424 10.401 10.371 10.335 10.293 10.245 10.192 10.134 10.07 10.003 9.931 9.855 9.775 9.692 9.605 9.516 9.424 9.329 9.233 9.134 9.033 8.93 8.827 8.721 8.615 8.508 8.4 8.291 8.181 8.072 7.962 7.852 7.741 7.631 7.521 7.411 7.302 7.193 7.084 6.976 6.869 6.762 6.656 6.551 6.447 6.344 6.241 6.139 6.039 5.939 5.841 5.743 5.647 5.552 5.458 5.365 5.273 5.182 5.093 5.005 4.918 4.832 4.747 4.664 4.581 4.5 4.42 4.342 4.264 4.188 4.113 4.039 3.966 3.894 3.824 3.754 3.686 3.619 3.553 3.488 3.424 3.361 3.299 3.238 3.179 3.12 3.062 3.006 2.95 2.895 2.841 2.789 2.737 2.686 2.636 2.586 2.538 2.491 2.444 2.398 2.353 2.309 2.266 2.223 2.181 2.14 2.1 2.06 2.022 1.983 1.946 1.909 1.873 1.838 1.803 1.769 1.736 1.703 1.67 1.639 1.608 1.577 1.547 1.518 1.489 1.461 1.433 1.406 1.379 1.353 1.327 1.302 1.277 1.253 1.229

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.308" PeakHeight="110.0" Num="3" Error="0.0">
-30.441 13.063 -3.126
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.308" EndFrequency="10.45" PeakHeight="316.756" Num="5" zHalfNm="207.106" Error="2.925">
-196.68 -7.576 4.924 -2.82 1.058
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="5.662" Depth="0.123"/>
<TopsideChapman PeakHeight="316.756" PeakDensity="1354869.8" PeakScaleHeight="80.951" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
