<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-31 -304 18:50:00.000"
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" >
2026.10.31 (304) 18:50:00</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">
FF202630410311850009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="12.250" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.684" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="32.884" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="8.850" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="8.850" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="12.550" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="395.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="395.000" 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="11.600" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="460.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="2.643" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="8.850" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="8.850" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="346.571" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="249.514" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="10.354" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="132.660" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="56.409" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="70.063" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="151.790" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.520" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="69">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
8.85 8.9 8.95 9.0 9.05 9.1 9.15 9.2 9.25 9.3 9.35 9.4 9.45 9.5 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 11.75 11.8 11.85 11.9 11.95 12.0 12.05 12.1 12.15 12.2 12.25
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
395.000 395.000 395.000 395.000 395.000 395.000 395.000 395.000 400.000 400.000 400.000 400.000 400.000 400.000 400.000 400.000 400.000 405.000 405.000 405.000 405.000 405.000 410.000 410.000 410.000 410.000 415.000 415.000 415.000 415.000 417.500 420.000 420.000 420.000 420.000 420.000 420.000 420.000 425.000 425.000 430.000 430.000 430.000 435.000 435.000 435.000 440.000 440.000 445.000 445.000 450.000 450.000 455.000 455.000 460.000 460.000 470.000 473.278 477.013 481.309 486.303 492.178 499.192 507.711 518.278 531.730 549.439 573.802 609.440
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 0 0 69 0 0 0 0 0 0 0 72 69 0 69 66 63 0 0 0 72 69 66 69 72 72 63 0 0 72 0 63 0 69 69 0 60 60 66 69 63 66 66 63 66 66 63 66 63 66 60 63 60 63 66 63 60 57 60 60 60 60 60 57 54 48 51 48 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 -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" >
89.611 90.0 95.0 100.0 105.0 110.0 114.878 115.0 119.755 120.0 124.633 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 346.571 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.232 1.775 2.288 2.557 2.643 2.52 2.52 2.52 2.526 2.643 2.656 2.832 3.021 3.222 3.436 3.662 3.9 4.147 4.401 4.66 4.923 5.187 5.45 5.713 5.974 6.232 6.488 6.742 6.992 7.241 7.486 7.73 7.972 8.211 8.449 8.685 8.919 9.152 9.384 9.614 9.842 10.069 10.294 10.515 10.734 10.948 11.157 11.359 11.55 11.729 11.89 12.029 12.138 12.213 12.248 12.25 12.247 12.233 12.208 12.172 12.126 12.07 12.005 11.932 11.851 11.763 11.667 11.565 11.458 11.345 11.227 11.104 10.978 10.847 10.714 10.577 10.438 10.297 10.154 10.009 9.862 9.715 9.567 9.418 9.269 9.12 8.971 8.822 8.673 8.525 8.378 8.231 8.085 7.941 7.797 7.655 7.514 7.374 7.236 7.1 6.965 6.831 6.7 6.57 6.442 6.315 6.191 6.068 5.947 5.828 5.711 5.595 5.482 5.37 5.261 5.153 5.047 4.943 4.841 4.74 4.641 4.545 4.45 4.356 4.265 4.175 4.087 4.0 3.916 3.833 3.751 3.671 3.593 3.516 3.441 3.367 3.295 3.224 3.155 3.087 3.021 2.956 2.892 2.829 2.768 2.708 2.649 2.592 2.536 2.481 2.427 2.374 2.322 2.272 2.222 2.174 2.127 2.08 2.035 1.99 1.947 1.904 1.863 1.822 1.782 1.743 1.705 1.668 1.631 1.595 1.56 1.526 1.493 1.46 1.428 1.396 1.366 1.336 1.307 1.278 1.25 1.222 1.195 1.169 1.143 1.118 1.094

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.643" PeakHeight="110.0" Num="3" Error="0.0">
-29.864 12.224 -2.749
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.643" EndFrequency="12.25" PeakHeight="346.571" Num="5" zHalfNm="249.514" Error="2.546">
-204.601 -29.6 18.661 -7.616 1.218
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="14.633" Depth="0.123"/>
<TopsideChapman PeakHeight="346.571" PeakDensity="1861817.6" PeakScaleHeight="70.063" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
