<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-20 -293 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="12.0">
<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: F2o cusp not found, Multiple candidates for F2x cusp, 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" >
2026.10.20 (293) 18:50:00</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">
FF202629310201850009039031101000005012000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="9.750" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.471" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="24.097" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="8.950" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="8.950" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.100" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="502.172" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="502.172" 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="8.950" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="502.172" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="2.658" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="8.950" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="8.950" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="374.212" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="246.897" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="10.352" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="173.554" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="47.069" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="93.894" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="187.700" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.850" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="17">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
502.172 506.524 511.274 515.000 520.000 530.000 535.000 545.000 550.000 560.000 575.000 585.000 605.000 620.000 645.000 670.000 703.994
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
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 -1.953125 -2.734375 2.734375 2.734375 -1.171875 -2.734375 -0.390625 -1.953125 -1.171875 -0.390625 -1.953125 -1.171875 2.734375 1.171875 -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" >
89.608 90.0 95.0 100.0 105.0 110.0 114.808 115.0 119.615 120.0 124.423 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 374.212 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.232 1.785 2.301 2.572 2.658 2.535 2.535 2.535 2.545 2.658 2.675 2.821 2.966 3.112 3.26 3.412 3.569 3.73 3.895 4.065 4.24 4.419 4.601 4.787 4.974 5.163 5.352 5.542 5.731 5.919 6.105 6.289 6.471 6.651 6.828 7.002 7.173 7.342 7.507 7.669 7.827 7.982 8.134 8.281 8.424 8.563 8.697 8.825 8.948 9.065 9.175 9.278 9.373 9.458 9.534 9.6 9.655 9.697 9.728 9.745 9.75 9.75 9.746 9.738 9.724 9.706 9.682 9.655 9.623 9.587 9.547 9.503 9.456 9.406 9.352 9.296 9.236 9.174 9.109 9.042 8.973 8.901 8.828 8.753 8.676 8.598 8.518 8.437 8.355 8.272 8.187 8.102 8.017 7.93 7.843 7.756 7.668 7.58 7.491 7.403 7.314 7.226 7.137 7.048 6.96 6.872 6.784 6.696 6.609 6.522 6.436 6.35 6.264 6.179 6.095 6.011 5.928 5.845 5.763 5.682 5.601 5.522 5.442 5.364 5.286 5.21 5.134 5.058 4.984 4.91 4.837 4.765 4.694 4.624 4.554 4.485 4.418 4.35 4.284 4.219 4.154 4.09 4.028 3.965 3.904 3.844 3.784 3.725 3.667 3.61 3.553 3.498 3.443 3.389 3.335 3.282 3.231 3.18 3.129 3.079 3.031 2.982 2.935 2.888 2.842 2.796 2.752 2.708 2.664 2.621 2.579 2.538 2.497 2.457 2.417 2.378 2.34 2.302 2.265 2.228 2.192 2.157 2.122 2.087 2.053 2.02 1.987

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.658" PeakHeight="110.0" Num="3" Error="0.0">
-29.879 12.246 -2.759
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.658" EndFrequency="9.75" PeakHeight="374.212" Num="5" zHalfNm="246.897" Error="2.882">
-243.233 -11.201 7.234 -3.981 1.392
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="14.423" Depth="0.123"/>
<TopsideChapman PeakHeight="374.212" PeakDensity="1179435.5" PeakScaleHeight="93.894" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
