<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-15 -288 16:50:00.000"
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="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 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 70% PACIFIC flags: F2o 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" >
2026.10.15 (288) 16:50:00</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">
FF202628810151650009039031101000005015000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="26" >
<URSI ID="00" Val="6.950" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.912" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="20.238" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.800" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.800" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="7.250" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="355.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="355.000" 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="0.250" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="6.900" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="435.481" 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="3.226" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.800" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.800" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.284" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="267.820" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="172.699" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.726" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="103.874" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="16.199" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="61.947" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="167.410" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.060" 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" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
355.000 360.000 365.000 365.000 370.000 375.000 380.000 385.000 390.000 395.000 395.000 400.000 400.000 401.697 403.602 405.757 408.215 411.044 414.335 418.212 422.845 428.480 435.481 444.415
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
63 63 63 63 60 57 60 63 60 60 63 63 63 63 60 63 54 63 63 57 63 63 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 1.953125
</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" >
89.508 90.0 95.0 100.0 105.0 110.0 112.232 114.464 115.0 116.696 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 267.82 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.239 2.17 2.792 3.121 3.226 3.104 3.104 3.133 3.226 3.324 3.48 3.643 3.809 3.975 4.136 4.291 4.44 4.581 4.717 4.847 4.971 5.091 5.208 5.321 5.431 5.54 5.646 5.751 5.855 5.959 6.062 6.166 6.27 6.376 6.484 6.595 6.708 6.824 6.926 6.95 6.949 6.941 6.925 6.901 6.87 6.832 6.787 6.737 6.681 6.62 6.555 6.485 6.411 6.334 6.254 6.171 6.086 5.998 5.909 5.818 5.726 5.632 5.538 5.443 5.348 5.252 5.156 5.06 4.965 4.87 4.775 4.681 4.587 4.494 4.402 4.311 4.221 4.132 4.044 3.958 3.872 3.788 3.705 3.623 3.542 3.463 3.385 3.309 3.234 3.16 3.087 3.016 2.947 2.878 2.811 2.745 2.681 2.618 2.556 2.496 2.437 2.379 2.322 2.267 2.212 2.159 2.107 2.057 2.007 1.959 1.911 1.865 1.82 1.776 1.732 1.69 1.649 1.609 1.57 1.531 1.494 1.457 1.421 1.387 1.352 1.319 1.287 1.255 1.224 1.194 1.165 1.136 1.108 1.081 1.054 1.028 1.002 0.978 0.954 0.93 0.907 0.884 0.863 0.841 0.82 0.8 0.78 0.761 0.742 0.724 0.706 0.688 0.671 0.654 0.638 0.622 0.607 0.592 0.577 0.563 0.549 0.535 0.522 0.509 0.496 0.484 0.472 0.46 0.449 0.437 0.427 0.416 0.406 0.396 0.386 0.376 0.367 0.358 0.349 0.34 0.332 0.323 0.315 0.307 0.3 0.292 0.285

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.226" PeakHeight="110.0" Num="3" Error="0.0">
-30.378 12.97 -3.084
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.226" EndFrequency="6.95" PeakHeight="267.82" Num="5" zHalfNm="172.699" Error="1.466">
-120.888 -47.903 24.361 -7.509 0.815
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="6.696" Depth="0.122"/>
<TopsideChapman PeakHeight="267.82" PeakDensity="599286.6" PeakScaleHeight="61.947" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
