<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-25 -298 18:10:00.000"
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 11 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 90% PACIFIC flags: 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) 18:10:00</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">
FF202629810251810009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="11.600" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.851" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="33.068" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="9.650" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="9.650" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="12.100" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="380.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="380.000" 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="10.800" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="405.000" 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="2.894" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="9.700" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="9.700" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="314.941" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="220.124" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="10.193" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="129.737" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="49.603" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="69.694" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="140.940" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.790" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="40">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
385.000 380.000 380.000 382.000 384.000 386.000 388.000 390.000 390.000 390.000 390.000 390.000 395.000 395.000 395.000 395.000 395.000 395.000 400.000 400.000 405.000 405.000 405.000 405.000 410.000 413.860 418.099 422.774 427.959 433.739 440.225 447.553 455.900 465.493 476.635 489.733 505.351 524.296 547.755 577.563
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 60 51 0 0 0 0 0 63 54 0 0 0 48 0 0 0 0 0 0 45 0 0 0 51 0 0 0 0 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 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 -1.953125 -2.734375 0.390625 -2.734375 0.390625 -1.953125 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" >
89.564 90.0 95.0 100.0 105.0 110.0 113.695 115.0 117.391 120.0 121.086 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 314.941 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.235 1.945 2.505 2.8 2.894 2.772 2.772 2.772 2.858 2.894 3.062 3.28 3.503 3.734 3.975 4.227 4.489 4.761 5.041 5.328 5.619 5.912 6.207 6.5 6.792 7.081 7.366 7.647 7.924 8.196 8.463 8.724 8.98 9.231 9.475 9.713 9.943 10.165 10.378 10.58 10.771 10.947 11.108 11.25 11.372 11.47 11.542 11.585 11.6 11.6 11.594 11.577 11.55 11.512 11.465 11.409 11.344 11.272 11.192 11.105 11.012 10.913 10.808 10.699 10.584 10.466 10.344 10.219 10.09 9.959 9.826 9.691 9.554 9.415 9.275 9.135 8.993 8.852 8.71 8.568 8.426 8.284 8.143 8.002 7.862 7.723 7.585 7.447 7.311 7.177 7.043 6.911 6.78 6.651 6.524 6.398 6.273 6.15 6.029 5.91 5.793 5.677 5.563 5.451 5.34 5.231 5.125 5.019 4.916 4.815 4.715 4.617 4.521 4.426 4.334 4.242 4.153 4.065 3.979 3.895 3.812 3.731 3.652 3.574 3.497 3.422 3.349 3.277 3.206 3.137 3.07 3.003 2.938 2.875 2.812 2.751 2.692 2.633 2.576 2.52 2.465 2.411 2.358 2.307 2.257 2.207 2.159 2.112 2.065 2.02 1.976 1.932 1.89 1.849 1.808 1.768 1.729 1.691 1.654 1.618 1.582 1.547 1.513 1.48 1.447 1.415 1.384 1.354 1.324 1.294 1.266 1.238 1.211 1.184 1.158 1.132 1.107 1.083 1.059 1.035 1.012 0.99 0.968 0.947 0.926 0.905 0.885

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.894" PeakHeight="110.0" Num="3" Error="0.0">
-30.105 12.57 -2.901
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.894" EndFrequency="11.6" PeakHeight="314.941" Num="5" zHalfNm="220.124" Error="2.192">
-187.425 -11.114 7.331 -3.721 1.074
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="11.086" Depth="0.122"/>
<TopsideChapman PeakHeight="314.941" PeakDensity="1669478.9" PeakScaleHeight="69.694" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
