<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-25 -298 16:40:00.000"
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 22 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 70% PACIFIC flags: F2x cusp not found, 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" >
2026.10.25 (298) 16:40:00</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">
FF202629810251640009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="10.950" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.623" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="28.720" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="9.950" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="9.950" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.250" 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="0.500" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="10.400" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="480.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="3.240" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="9.950" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="9.950" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.291" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="323.131" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="215.213" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.652" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="143.845" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="49.330" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="77.768" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="161.880" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.690" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="21">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 10.65 10.7 10.75 10.8 10.85 10.9 10.95
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
465.000 465.000 470.000 475.000 472.500 470.000 470.000 475.000 480.000 480.000 485.000 490.000 495.000 500.000 500.000 510.000 517.693 527.551 540.639 558.855 585.944
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 57 54 48 54 54 0 0 0 54 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 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 1.953125 -1.171875 -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" >
89.506 90.0 95.0 100.0 105.0 110.0 112.172 114.345 115.0 116.517 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 323.131 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.239 2.179 2.804 3.135 3.24 3.118 3.118 3.155 3.24 3.387 3.586 3.782 3.979 4.181 4.391 4.609 4.837 5.073 5.317 5.566 5.818 6.071 6.323 6.571 6.815 7.053 7.286 7.513 7.734 7.949 8.159 8.363 8.563 8.758 8.949 9.134 9.316 9.493 9.665 9.832 9.994 10.149 10.297 10.436 10.564 10.679 10.778 10.857 10.914 10.945 10.95 10.949 10.942 10.926 10.902 10.87 10.832 10.786 10.734 10.676 10.611 10.542 10.467 10.388 10.304 10.216 10.124 10.028 9.93 9.828 9.723 9.617 9.508 9.396 9.284 9.169 9.054 8.937 8.819 8.7 8.581 8.462 8.342 8.221 8.101 7.981 7.861 7.741 7.622 7.503 7.385 7.268 7.151 7.035 6.92 6.806 6.692 6.58 6.469 6.359 6.25 6.142 6.036 5.93 5.826 5.724 5.622 5.522 5.423 5.326 5.23 5.135 5.042 4.95 4.859 4.77 4.682 4.595 4.51 4.426 4.344 4.262 4.182 4.104 4.027 3.951 3.876 3.802 3.73 3.659 3.589 3.521 3.453 3.387 3.322 3.259 3.196 3.134 3.074 3.014 2.956 2.899 2.843 2.788 2.733 2.68 2.628 2.577 2.527 2.477 2.429 2.382 2.335 2.289 2.245 2.201 2.157 2.115 2.074 2.033 1.993 1.954 1.915 1.878 1.841 1.805 1.769 1.734 1.7 1.666 1.634 1.601 1.57 1.539 1.508 1.479 1.449 1.421 1.393 1.365 1.338 1.312 1.286 1.26 1.235 1.211 1.187

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.24" PeakHeight="110.0" Num="3" Error="0.0">
-30.389 12.986 -3.091
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.24" EndFrequency="10.95" PeakHeight="323.131" Num="5" zHalfNm="215.213" Error="4.706">
-195.485 -19.145 12.52 -6.875 2.371
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="6.517" Depth="0.122"/>
<TopsideChapman PeakHeight="323.131" PeakDensity="1487624.1" PeakScaleHeight="77.768" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
