<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-14 -287 08:00:00.000"
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="15.0">
<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 22 2 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 70% PACIFIC flags: Severe F-spread, F2x cusp not found, 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" >
2026.10.14 (287) 08:00:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.39" 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">
FF202628710140800009039031101000005015000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="5.550" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.963" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="16.442" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.400" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.400" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="6.300" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="295.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="295.000" 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="0.450" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="4.550" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="306.875" 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="0.449" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.400" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.400" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="353.055" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="283.346" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="3.882" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="99.262" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="8.500" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="53.881" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="84.350" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="3.850" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="24">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
4.4 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
295.000 297.500 300.000 306.875 313.750 320.625 327.500 334.375 341.250 348.125 356.536 365.649 375.556 386.365 398.207 411.236 425.641 441.650 459.548 479.691 502.529 528.641 558.786 593.977
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 66 0 0 0 0 0 0 66 0 60 0 0 0 57 57 60 0 0 0 0 51 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 0.390625 1.171875 0.390625 0.390625 0.390625 1.171875 0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 1.171875 0.390625 0.390625 0.390625 1.171875 -0.390625 0.390625 -0.390625 0.390625 -0.390625 2.734375
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="187">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
92.079 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 138.625 140.0 145.0 150.0 155.0 160.0 165.0 167.251 170.0 175.0 180.0 185.0 190.0 195.0 195.876 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 353.055 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.297 0.389 0.435 0.449 0.443 0.426 0.396 0.35 0.279 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.224 0.267 0.311 0.354 0.398 0.441 0.449 0.51 0.602 0.709 0.827 0.953 1.086 1.229 1.383 1.551 1.737 1.945 2.179 2.444 2.74 3.062 3.396 3.721 4.02 4.286 4.516 4.715 4.885 5.03 5.153 5.256 5.341 5.411 5.466 5.506 5.533 5.548 5.55 5.549 5.541 5.525 5.5 5.468 5.429 5.384 5.332 5.276 5.215 5.149 5.08 5.007 4.931 4.852 4.772 4.689 4.605 4.52 4.433 4.346 4.259 4.171 4.083 3.995 3.907 3.82 3.734 3.648 3.563 3.479 3.396 3.314 3.233 3.153 3.075 2.998 2.922 2.848 2.775 2.703 2.633 2.565 2.497 2.431 2.367 2.304 2.242 2.182 2.123 2.066 2.01 1.955 1.902 1.85 1.799 1.75 1.702 1.655 1.609 1.564 1.521 1.479 1.438 1.397 1.358 1.32 1.283 1.247 1.212 1.178 1.145 1.113 1.082 1.051 1.022 0.993 0.965 0.937 0.911 0.885 0.86 0.836 0.812 0.789 0.766 0.745 0.724 0.703 0.683 0.664 0.645 0.626 0.609 0.591 0.574 0.558 0.542 0.527 0.512 0.497 0.483 0.469 0.456 0.443 0.43 0.418 0.406 0.394 0.383 0.372 0.362 0.351 0.341 0.332 0.322 0.313 0.304 0.295 0.287 0.279 0.271 0.263 0.255 0.248 0.241 0.234 0.227 0.221 0.215

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.449" PeakHeight="110.0" Num="3" Error="0.0">
-21.365 3.749 -0.305
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.449" EndFrequency="5.55" PeakHeight="353.055" Num="5" zHalfNm="283.346" Error="8.296">
-174.523 29.139 -18.421 9.323 -2.697
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="85.876" Depth="0.249"/>
<TopsideChapman PeakHeight="353.055" PeakDensity="382165.0" PeakScaleHeight="53.881" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
