<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-25 -298 17:30:00.000"
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: 30% PACIFIC flags: F2o cusp not found, One of F2 cusps was derived from the other, F2O model cusp does not fit trace, Trace overlaps while constructing baseline</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) 17:30:00</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">
FF202629810251730009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="11.700" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.707" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="31.676" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="9.550" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="9.550" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="5.300" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="405.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="405.000" 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="0.200" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="10.950" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="445.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="3.077" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="9.550" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="9.550" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.212" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="324.641" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="224.125" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.990" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="134.353" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="52.328" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="71.706" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="153.590" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.570" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="44">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 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 11.0 11.05 11.1 11.15 11.2 11.25 11.3 11.35 11.4 11.45 11.5 11.55 11.6 11.65 11.7
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
405.000 405.000 405.000 405.000 405.000 405.000 405.000 410.000 411.667 413.333 415.000 416.667 418.333 420.000 420.000 420.000 420.000 420.000 425.000 425.000 425.000 430.000 430.000 430.000 435.000 440.000 440.000 445.000 445.000 450.000 455.000 460.000 465.000 470.000 470.000 475.000 480.000 490.000 495.000 505.000 515.000 530.000 550.000 575.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 0 0 0 0 0 0 0 0 42 0 54 0 54 60 57 63 60 60 57 0 54 51 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 54 0 0 45
</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 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 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" >
89.533 90.0 95.0 100.0 105.0 110.0 112.875 115.0 115.749 118.624 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 324.641 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.238 2.069 2.663 2.977 3.077 2.955 2.955 2.955 3.077 3.136 3.343 3.548 3.758 3.976 4.204 4.443 4.693 4.952 5.22 5.493 5.769 6.044 6.317 6.586 6.85 7.108 7.36 7.606 7.847 8.083 8.313 8.539 8.761 8.979 9.193 9.404 9.611 9.815 10.015 10.212 10.406 10.594 10.777 10.954 11.121 11.277 11.416 11.535 11.626 11.682 11.7 11.7 11.694 11.677 11.65 11.613 11.568 11.514 11.451 11.381 11.304 11.221 11.131 11.035 10.934 10.828 10.718 10.604 10.485 10.364 10.239 10.112 9.982 9.851 9.717 9.582 9.446 9.309 9.171 9.032 8.893 8.754 8.614 8.475 8.336 8.198 8.06 7.923 7.787 7.651 7.517 7.383 7.251 7.12 6.99 6.862 6.735 6.61 6.486 6.363 6.243 6.123 6.006 5.89 5.776 5.663 5.552 5.443 5.336 5.23 5.126 5.024 4.923 4.824 4.727 4.631 4.537 4.445 4.354 4.265 4.178 4.092 4.008 3.926 3.844 3.765 3.687 3.61 3.535 3.462 3.389 3.319 3.249 3.181 3.114 3.049 2.985 2.922 2.861 2.8 2.741 2.683 2.627 2.571 2.516 2.463 2.411 2.36 2.31 2.261 2.212 2.165 2.119 2.074 2.03 1.987 1.944 1.903 1.862 1.822 1.783 1.745 1.708 1.671 1.636 1.601 1.566 1.533 1.5 1.468 1.436 1.406 1.376 1.346 1.317 1.289 1.261 1.234 1.208 1.182 1.156 1.132 1.107 1.083 1.06 1.037 1.015

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.077" PeakHeight="110.0" Num="3" Error="0.0">
-30.259 12.796 -3.004
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.077" EndFrequency="11.7" PeakHeight="324.641" Num="5" zHalfNm="224.125" Error="3.287">
-191.119 -25.734 16.949 -8.491 2.378
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="8.624" Depth="0.122"/>
<TopsideChapman PeakHeight="324.641" PeakDensity="1698387.1" PeakScaleHeight="71.706" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
