<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-24 -297 18:20:00.000"
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: 45% PACIFIC flags: F2x cusp not found, Multiple candidates for F2o cusp, One of F2 cusps was derived from the other, Unidentified traces above foF2</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" >
2026.10.24 (297) 18:20:00</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">
FF202629710241820009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="10.700" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.645" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="28.306" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="10.050" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="10.050" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.100" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="470.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="470.000" 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="0.400" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="10.250" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="480.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="2.841" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="10.050" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="10.050" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="318.658" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="220.486" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="10.236" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="132.476" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="43.143" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="70.995" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="146.570" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.710" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="14">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
470.000 473.333 476.667 480.000 480.000 485.000 488.762 492.959 497.671 502.999 509.072 516.060 524.183 533.745
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 0 54 54 60 57 54 51 51 51 48 48 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
</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" >
89.574 90.0 95.0 100.0 105.0 110.0 113.94 115.0 117.88 120.0 121.82 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 318.658 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.235 1.909 2.459 2.749 2.841 2.719 2.719 2.719 2.785 2.841 2.979 3.181 3.378 3.578 3.784 4.0 4.226 4.463 4.711 4.968 5.232 5.5 5.769 6.037 6.302 6.562 6.817 7.065 7.307 7.543 7.774 7.998 8.217 8.431 8.64 8.844 9.042 9.236 9.424 9.605 9.78 9.947 10.104 10.249 10.381 10.494 10.586 10.653 10.692 10.7 10.7 10.692 10.674 10.647 10.612 10.567 10.515 10.456 10.39 10.317 10.238 10.153 10.063 9.968 9.869 9.766 9.659 9.548 9.435 9.319 9.201 9.08 8.958 8.834 8.709 8.582 8.455 8.327 8.199 8.071 7.942 7.813 7.685 7.557 7.429 7.302 7.176 7.05 6.926 6.802 6.679 6.558 6.438 6.319 6.201 6.085 5.97 5.856 5.744 5.634 5.525 5.417 5.311 5.207 5.104 5.003 4.903 4.805 4.709 4.614 4.52 4.429 4.339 4.25 4.163 4.078 3.994 3.911 3.83 3.751 3.673 3.597 3.522 3.448 3.376 3.305 3.236 3.168 3.101 3.036 2.971 2.909 2.847 2.787 2.727 2.669 2.613 2.557 2.503 2.449 2.397 2.346 2.295 2.246 2.198 2.151 2.105 2.06 2.016 1.972 1.93 1.888 1.848 1.808 1.769 1.731 1.693 1.657 1.621 1.586 1.552 1.518 1.486 1.453 1.422 1.391 1.361 1.332 1.303 1.275 1.247 1.22 1.194 1.168 1.142 1.118 1.093 1.07 1.047 1.024 1.002 0.98 0.959 0.938 0.917 0.898 0.878

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.841" PeakHeight="110.0" Num="3" Error="0.0">
-30.057 12.501 -2.87
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.841" EndFrequency="10.7" PeakHeight="318.658" Num="5" zHalfNm="220.486" Error="5.195">
-186.84 -17.195 11.226 -6.359 2.33
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="11.82" Depth="0.122"/>
<TopsideChapman PeakHeight="318.658" PeakDensity="1420471.5" PeakScaleHeight="70.995" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
