<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-15 -288 21:00:00.000"
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 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" >
2026.10.15 (288) 21:00:00</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">
FF202628810152100009039031101000005015000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="10.150" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.442" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="24.789" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.850" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.850" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.500" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="335.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="335.000" 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="88" Val="9.550" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="531.977" 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="0.819" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.850" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.850" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="425.277" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="327.042" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="10.163" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="141.034" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="39.668" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="73.855" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="135.790" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="2.320" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="87">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
335.000 335.000 336.000 337.000 338.000 339.000 340.000 345.000 345.000 345.000 350.000 350.000 350.000 350.000 352.000 354.000 356.000 358.000 360.000 365.000 365.000 365.000 368.151 371.301 374.452 377.602 380.753 383.903 387.054 390.204 393.355 396.505 399.656 402.806 405.957 409.107 412.258 415.408 418.559 421.709 424.860 428.010 431.161 434.311 437.462 440.612 443.763 446.913 450.064 453.214 456.365 459.515 462.666 465.816 468.967 472.117 475.268 478.418 481.569 484.719 487.870 491.020 494.171 497.321 500.472 503.622 506.773 509.923 513.074 516.224 519.375 522.525 525.676 528.826 531.977 535.127 538.278 545.000 555.000 570.000 580.000 595.000 610.000 625.000 645.000 670.000 697.097
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
78 75 0 0 0 0 0 78 75 0 78 75 0 0 0 0 0 0 0 78 75 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" >
-1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 2.734375 2.734375 1.953125 1.171875 2.734375 2.734375 2.734375 1.953125 2.734375 -0.390625 1.171875 1.171875 1.171875 -1.171875 -1.953125 -1.953125 1.953125 -1.171875 1.171875 -2.734375 0.390625 -1.953125 0.390625 -1.953125 1.171875 2.734375 1.171875 1.953125 -1.171875 0.390625 -1.171875 0.390625 -2.734375 -2.734375 -1.171875 2.734375 -2.734375 -1.171875 2.734375 -2.734375 -2.734375 -1.953125 -1.171875 -0.390625 1.171875 2.734375 -1.171875 -1.953125 2.734375 -0.390625 1.953125 1.953125 -2.734375 2.734375 -0.390625 -1.171875 1.171875 2.734375 -1.171875
</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" >
90.515 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 132.487 135.0 140.0 145.0 150.0 154.975 155.0 160.0 165.0 170.0 175.0 177.462 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 425.277 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.544 0.71 0.793 0.819 0.806 0.766 0.694 0.579 0.496 0.496 0.496 0.496 0.496 0.496 0.496 0.568 0.64 0.712 0.784 0.819 0.879 0.988 1.093 1.2 1.31 1.426 1.549 1.679 1.819 1.969 2.13 2.303 2.49 2.69 2.904 3.132 3.374 3.628 3.893 4.168 4.451 4.741 5.034 5.33 5.627 5.922 6.215 6.504 6.788 7.066 7.336 7.598 7.851 8.095 8.327 8.548 8.758 8.954 9.138 9.308 9.463 9.604 9.729 9.839 9.932 10.01 10.07 10.114 10.14 10.15 10.15 10.146 10.133 10.112 10.083 10.047 10.003 9.953 9.896 9.833 9.765 9.692 9.613 9.53 9.443 9.352 9.258 9.16 9.06 8.956 8.851 8.743 8.633 8.522 8.409 8.296 8.181 8.065 7.949 7.832 7.715 7.597 7.48 7.363 7.246 7.129 7.013 6.897 6.782 6.668 6.554 6.442 6.33 6.219 6.11 6.001 5.894 5.788 5.682 5.579 5.476 5.375 5.275 5.177 5.079 4.984 4.889 4.796 4.704 4.614 4.525 4.438 4.352 4.267 4.184 4.102 4.021 3.942 3.864 3.788 3.713 3.639 3.566 3.495 3.425 3.357 3.289 3.223 3.158 3.094 3.032 2.97 2.91 2.851 2.793 2.736 2.681 2.626 2.572 2.52 2.468 2.418 2.368 2.319 2.272 2.225 2.179 2.134 2.09 2.047 2.005 1.964 1.923 1.883 1.845 1.806 1.769 1.732 1.697 1.661 1.627 1.593 1.56 1.528 1.496 1.465

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.819" PeakHeight="110.0" Num="3" Error="0.0">
-25.534 7.003 -0.954
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.819" EndFrequency="10.15" PeakHeight="425.277" Num="5" zHalfNm="327.042" Error="4.075">
-255.775 11.253 -5.883 1.25 1.34
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="67.462" Depth="0.323"/>
<TopsideChapman PeakHeight="425.277" PeakDensity="1278194.8" PeakScaleHeight="73.855" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
