<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-15 -288 19:50:00.000"
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 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) 19:50:00</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">
FF202628810151950009039031101000005015000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="10.400" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.543" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="26.447" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="6.250" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="6.250" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.750" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="320.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="320.000" 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="9.700" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="490.774" 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="2.112" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="6.250" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="6.250" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="379.191" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="268.733" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="10.472" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="153.240" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="46.729" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="81.323" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="166.050" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.740" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="84">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
320.000 330.000 330.000 331.667 333.333 335.000 335.000 335.000 335.000 335.000 337.500 340.000 340.000 342.500 345.000 345.000 347.700 350.399 353.099 355.798 358.498 361.197 363.897 366.596 369.296 371.995 374.695 377.394 380.094 382.793 385.493 388.192 390.892 393.591 396.291 398.990 401.690 404.389 407.089 409.788 412.488 415.187 417.887 420.586 423.286 425.985 428.685 431.384 434.084 436.783 439.483 442.182 444.882 447.581 450.281 452.980 455.680 458.379 461.079 463.778 466.478 469.178 471.877 474.577 477.276 479.976 482.675 485.375 488.074 490.774 495.000 500.000 510.000 515.000 525.000 530.000 540.000 555.000 565.000 580.000 600.000 620.000 640.000 670.381
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 69 72 0 0 69 75 0 78 78 0 78 75 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 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 -2.734375 1.953125 2.734375 -2.734375 -1.953125 0.390625 2.734375 -0.390625 1.171875 -1.953125 0.390625 -2.734375 1.953125 -1.171875 0.390625 -1.953125 2.734375 0.390625 1.171875 0.390625 -1.953125 1.171875 0.390625 1.953125 -1.171875 0.390625 1.171875 0.390625 0.390625 0.390625 -2.734375 2.734375 1.171875 -0.390625 1.953125 2.734375 -1.171875 -1.953125 -1.953125 2.734375 -0.390625 -2.734375 -1.953125 2.734375 -1.953125 1.953125 0.390625 1.953125 2.734375 -1.953125 2.734375 -2.734375 -1.953125 1.953125 2.734375
</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" >
89.731 90.0 95.0 100.0 105.0 110.0 115.0 117.598 120.0 125.0 125.197 130.0 132.795 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 379.191 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.223 1.416 1.829 2.044 2.112 2.056 1.982 1.982 1.982 1.982 2.064 2.112 2.176 2.322 2.473 2.628 2.789 2.956 3.129 3.309 3.494 3.685 3.882 4.082 4.286 4.493 4.702 4.913 5.124 5.336 5.547 5.758 5.969 6.178 6.386 6.593 6.798 7.002 7.204 7.404 7.603 7.798 7.992 8.183 8.371 8.555 8.736 8.912 9.084 9.25 9.41 9.563 9.707 9.842 9.966 10.077 10.174 10.255 10.32 10.366 10.393 10.4 10.4 10.395 10.383 10.363 10.337 10.305 10.266 10.222 10.172 10.116 10.056 9.992 9.922 9.849 9.772 9.692 9.608 9.521 9.431 9.339 9.244 9.148 9.049 8.948 8.846 8.743 8.638 8.532 8.426 8.318 8.21 8.102 7.993 7.884 7.775 7.666 7.557 7.448 7.339 7.231 7.123 7.016 6.909 6.803 6.697 6.592 6.489 6.385 6.283 6.182 6.082 5.982 5.884 5.787 5.69 5.595 5.501 5.408 5.317 5.226 5.136 5.048 4.961 4.875 4.79 4.706 4.624 4.543 4.463 4.384 4.306 4.229 4.154 4.08 4.007 3.935 3.864 3.794 3.726 3.658 3.592 3.526 3.462 3.399 3.337 3.276 3.216 3.157 3.099 3.042 2.986 2.931 2.876 2.823 2.771 2.72 2.669 2.62 2.571 2.523 2.476 2.43 2.385 2.34 2.296 2.254 2.211 2.17 2.129 2.089 2.05 2.012 1.974 1.937 1.901 1.865 1.83 1.795 1.762 1.728 1.696 1.664 1.632 1.602 1.571

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.112" PeakHeight="110.0" Num="3" Error="0.0">
-29.232 11.34 -2.377
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.112" EndFrequency="10.4" PeakHeight="379.191" Num="5" zHalfNm="268.733" Error="2.321">
-236.904 -17.021 11.163 -4.831 1.197
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="22.795" Depth="0.13"/>
<TopsideChapman PeakHeight="379.191" PeakDensity="1341935.5" PeakScaleHeight="81.323" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
