<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-12 -285 17:40:00.000"
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="18.0">
<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: 50% PACIFIC flags: F2o cusp not found, One of F2 cusps was derived from the other, F2O model cusp does not fit trace</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" >
2026.10.12 (285) 17:40:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.38" 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">
FF202628510121740009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="26" >
<URSI ID="00" Val="10.800" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.391" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="25.827" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.700" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.700" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.150" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="345.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="345.000" 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="0.050" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.950" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="532.359" 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="3.055" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.750" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.750" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.201" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="401.320" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="272.975" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="10.043" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="171.609" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="59.247" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="94.830" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="207.410" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.460" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="103">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 7.05 7.1 7.15 7.2 7.25 7.3 7.35 7.4 7.45 7.5 7.55 7.6 7.65 7.7 7.75 7.8 7.85 7.9 7.95 8.0 8.05 8.1 8.15 8.2 8.25 8.3 8.35 8.4 8.45 8.5 8.55 8.6 8.65 8.7 8.75 8.8 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
350.000 345.000 345.000 345.000 345.000 350.000 350.000 350.000 350.000 355.000 355.000 355.000 355.000 360.000 360.000 360.000 365.000 365.000 365.000 365.000 370.000 370.000 370.000 370.000 375.000 375.000 375.000 375.000 375.000 377.761 380.521 383.282 386.043 388.803 391.564 394.325 397.086 399.846 402.607 405.368 408.128 410.889 413.650 416.410 419.171 421.932 424.692 427.453 430.214 432.974 435.735 438.496 441.257 444.017 446.778 449.539 452.299 455.060 457.821 460.581 463.342 466.103 468.863 471.624 474.385 477.146 479.906 482.667 485.428 488.188 490.949 493.710 496.470 499.231 501.992 504.752 507.513 510.274 513.034 515.795 518.556 521.317 524.077 526.838 529.599 532.359 535.120 539.201 543.672 548.593 555.000 560.000 565.000 575.000 585.000 595.000 605.000 620.000 635.000 650.000 675.000 705.000 742.342
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 72 75 72 72 69 72 72 72 69 72 72 69 69 72 72 0 72 75 72 72 0 75 69 72 72 72 69 60 0 0 51 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 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 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 1.171875 0.390625 2.734375 -0.390625 -2.734375 0.390625 1.953125 2.734375 1.953125 -2.734375 2.734375 -0.390625 1.953125 -1.171875 2.734375 2.734375 -2.734375 2.734375 -2.734375 2.734375 0.390625 -1.171875 -1.953125 1.171875 1.171875 -0.390625 1.953125 -1.171875 -1.171875 -1.171875 1.171875 -0.390625 -2.734375 -1.171875 -1.953125 1.171875 0.390625 1.171875 1.171875 1.953125 0.390625 0.390625 2.734375 1.953125 2.734375 0.390625 0.390625 1.171875 1.171875 2.734375 -1.953125 2.734375 2.734375 1.953125 0.390625 -1.953125 -1.953125 1.171875 -0.390625 0.390625 1.171875
</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" >
89.536 90.0 95.0 100.0 105.0 110.0 112.971 115.0 115.943 118.914 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 401.32 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.237 2.054 2.644 2.956 3.055 2.933 2.933 2.933 3.055 3.091 3.249 3.4 3.547 3.692 3.834 3.976 4.117 4.258 4.399 4.54 4.681 4.823 4.966 5.11 5.255 5.4 5.546 5.694 5.842 5.992 6.143 6.294 6.447 6.601 6.755 6.911 7.068 7.225 7.383 7.542 7.701 7.861 8.022 8.182 8.342 8.503 8.662 8.822 8.98 9.136 9.291 9.443 9.592 9.737 9.878 10.014 10.142 10.264 10.376 10.478 10.568 10.645 10.708 10.755 10.786 10.799 10.8 10.798 10.791 10.779 10.761 10.738 10.71 10.677 10.64 10.598 10.552 10.503 10.449 10.392 10.332 10.269 10.202 10.133 10.06 9.986 9.909 9.83 9.749 9.666 9.581 9.494 9.406 9.317 9.227 9.135 9.042 8.949 8.855 8.76 8.664 8.568 8.472 8.375 8.278 8.181 8.084 7.986 7.889 7.792 7.695 7.599 7.502 7.406 7.31 7.215 7.12 7.026 6.932 6.839 6.747 6.655 6.563 6.473 6.383 6.294 6.206 6.118 6.031 5.945 5.86 5.776 5.692 5.61 5.528 5.447 5.367 5.288 5.21 5.132 5.056 4.981 4.906 4.832 4.759 4.687 4.616 4.546 4.477 4.409 4.341 4.275 4.209 4.144 4.08 4.017 3.955 3.894 3.833 3.774 3.715 3.657 3.6 3.543 3.488 3.433 3.379 3.326 3.273 3.222 3.171 3.12 3.071 3.022 2.974 2.927 2.881 2.835 2.79 2.745 2.701 2.658 2.616 2.574 2.533 2.492 2.452

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.055" PeakHeight="110.0" Num="3" Error="0.0">
-30.241 12.769 -2.992
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.055" EndFrequency="10.8" PeakHeight="401.32" Num="5" zHalfNm="272.975" Error="2.805">
-254.275 -41.762 14.265 -0.996 0.362
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="8.914" Depth="0.122"/>
<TopsideChapman PeakHeight="401.32" PeakDensity="1447146.4" PeakScaleHeight="94.83" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
