<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-27 -300 18:30:00.000"
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 11 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 95% PACIFIC flags: Multiple candidates for F2x cusp</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" >
2026.10.27 (300) 18:30:00</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">
FF202630010271830009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="7.000" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.159" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="22.115" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.950" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.950" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="7.200" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="335.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="335.000" 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="0.150" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="6.900" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="376.196" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="2.779" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.950" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.950" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="266.616" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="199.360" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="10.278" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="70.557" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="12.480" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="44.813" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="127.550" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.000" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="42">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 6.9 6.95 7.0
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
335.000 340.000 340.000 340.000 345.000 345.000 345.000 345.000 350.000 350.000 350.000 350.000 350.000 350.000 355.000 355.000 355.000 355.000 355.000 355.000 355.000 355.000 360.000 360.000 360.000 360.000 360.000 360.000 360.000 360.705 361.488 362.362 363.344 364.456 365.723 367.183 368.882 370.885 373.280 376.196 379.823 384.458
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
69 66 69 63 69 72 72 69 66 66 69 69 69 75 72 72 75 75 75 75 75 72 72 72 75 75 72 72 72 72 72 72 75 75 72 72 75 78 69 75 60 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 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="157">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.585 90.0 95.0 100.0 105.0 110.0 114.232 115.0 118.465 120.0 122.697 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 266.616 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 1.867 2.406 2.689 2.779 2.657 2.657 2.657 2.701 2.779 2.862 3.062 3.262 3.443 3.606 3.754 3.892 4.023 4.147 4.268 4.386 4.502 4.618 4.733 4.848 4.965 5.083 5.203 5.327 5.454 5.587 5.725 5.871 6.027 6.194 6.377 6.578 6.798 6.983 7.0 6.996 6.977 6.943 6.895 6.835 6.763 6.681 6.59 6.491 6.385 6.272 6.155 6.034 5.908 5.781 5.65 5.519 5.386 5.253 5.119 4.986 4.854 4.723 4.593 4.464 4.337 4.212 4.089 3.968 3.85 3.734 3.62 3.509 3.401 3.295 3.191 3.091 2.992 2.897 2.804 2.714 2.626 2.541 2.458 2.377 2.299 2.224 2.15 2.079 2.01 1.943 1.879 1.816 1.755 1.696 1.639 1.584 1.531 1.479 1.43 1.381 1.335 1.289 1.246 1.204 1.163 1.123 1.085 1.048 1.013 0.978 0.945 0.913 0.882 0.852 0.823 0.795 0.767 0.741 0.716 0.692 0.668 0.645 0.623 0.602 0.581 0.561 0.542 0.524 0.506 0.488 0.472 0.456 0.44 0.425 0.41 0.396 0.383 0.37 0.357 0.345 0.333 0.322 0.311 0.3 0.29 0.28 0.27 0.261 0.252 0.243 0.235 0.227 0.219 0.212 0.204

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.779" PeakHeight="110.0" Num="3" Error="0.0">
-29.998 12.416 -2.833
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.779" EndFrequency="7.0" PeakHeight="266.616" Num="5" zHalfNm="199.36" Error="4.063">
-105.647 -57.375 20.432 0.684 -2.013
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="12.697" Depth="0.122"/>
<TopsideChapman PeakHeight="266.616" PeakDensity="607940.44" PeakScaleHeight="44.813" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
