<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-25 -298 09:30:00.000"
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="1 2 0 0 0 0 0 0 0 33 0 0 0 0 0 0 0 0 0 0 "/>
<Comments>AR.5002.44 Confidence: 65% PACIFIC flags: F2x cusp not found, Multiple candidates for F2o cusp, 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) 09:30:00</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">
FF202629810250930009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="27" >
<URSI ID="00" Val="6.850" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.482" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="23.850" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="1.700" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.450" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="81" Val="1.700" Name="fminE" Units="MHz" QL="/" DL="/" />
<URSI ID="20" Val="1.910" Name="foE" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="7.150" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="255.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="255.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="24" Val="99.333" Name="h`E" Units="km" QL="/" DL="/" />
<URSI ID="90" Val="98.268" Name="hmE" Units="km" QL="/" DL="/" />
<URSI ID="83" Val="12.064" Name="yE" Units="km" QL="/" DL="/" />
<URSI ID="86" Val="0.050" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="6.350" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="286.474" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="2.069" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.450" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.450" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="248.458" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="186.580" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="6.757" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="86.998" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="12.125" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="48.707" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="87.250" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="2.500" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="49">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
4.45 4.5 4.55 4.6 4.65 4.7 4.75 4.8 4.85 4.9 4.95 5.0 5.05 5.1 5.15 5.2 5.25 5.3 5.35 5.4 5.45 5.5 5.55 5.6 5.65 5.7 5.75 5.8 5.85 5.9 5.95 6.0 6.05 6.1 6.15 6.2 6.25 6.3 6.35 6.4 6.45 6.5 6.55 6.6 6.65 6.7 6.75 6.8 6.85
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
255.000 255.000 255.000 255.000 255.000 260.000 260.000 260.000 260.323 260.645 260.968 261.290 261.613 261.935 262.258 262.581 262.903 263.226 263.548 263.871 264.194 264.516 264.839 265.161 265.484 265.806 266.129 266.452 266.774 267.097 268.366 269.773 271.341 273.098 275.083 277.341 279.934 282.942 286.474 290.678 295.768 302.057 310.024 320.444 334.657 355.194 387.484 445.662 581.687
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 0 0 0 0 0 0 0 0 48 0 51 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 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 1.171875 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 1.171875 0.390625 2.734375 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 1.171875 -0.390625 0.390625 0.390625 -0.390625 0.390625 -1.171875 -2.734375 0.390625 -1.953125 -1.953125 1.953125 1.171875 1.171875 -1.953125 -1.953125 1.171875 1.953125 0.390625
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="E" Polarization="O" Num="5">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
1.7 1.75 1.8 1.85 1.9
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
99.333 103.348 108.018 113.612 120.630
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 0 0 0 60
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
2.734375 0.390625 2.734375 0.390625 0.390625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="164">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
86.075 90.0 95.0 98.268 100.0 105.0 106.099 110.0 113.931 115.0 120.0 121.762 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 248.458 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 1.4 1.838 1.91 1.904 1.821 1.789 1.789 1.789 1.806 1.883 1.91 2.019 2.227 2.462 2.696 2.922 3.14 3.354 3.569 3.787 4.012 4.248 4.496 4.758 5.034 5.32 5.604 5.871 6.109 6.309 6.472 6.601 6.7 6.772 6.819 6.845 6.85 6.849 6.838 6.814 6.778 6.731 6.674 6.608 6.534 6.452 6.363 6.268 6.168 6.064 5.956 5.845 5.731 5.615 5.498 5.379 5.259 5.139 5.019 4.899 4.78 4.661 4.544 4.427 4.312 4.199 4.087 3.977 3.868 3.762 3.657 3.555 3.454 3.356 3.26 3.166 3.074 2.985 2.897 2.812 2.729 2.648 2.569 2.492 2.417 2.344 2.273 2.205 2.138 2.073 2.009 1.948 1.888 1.83 1.774 1.719 1.666 1.615 1.565 1.516 1.469 1.424 1.379 1.336 1.295 1.254 1.215 1.177 1.141 1.105 1.07 1.037 1.004 0.973 0.942 0.913 0.884 0.856 0.83 0.804 0.778 0.754 0.73 0.707 0.685 0.663 0.643 0.622 0.603 0.584 0.565 0.548 0.53 0.514 0.497 0.482 0.467 0.452 0.438 0.424 0.41 0.398 0.385 0.373 0.361 0.35 0.339 0.328 0.318 0.308 0.298 0.289 0.279 0.271 0.262 0.254 0.246 0.238 0.231 0.223 0.216 0.209 0.203

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="1.91" PeakHeight="98.268" Num="3" Error="1.777">
-17.447 6.589 -1.335
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="1.91" EndFrequency="6.85" PeakHeight="248.458" Num="5" zHalfNm="186.58" Error="6.252">
-127.045 3.055 -5.885 5.533 -2.354
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="23.494" Depth="0.121"/>
<TopsideChapman PeakHeight="248.458" PeakDensity="582165.0" PeakScaleHeight="48.707" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
