<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-24 -297 21:30:00.000"
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="14.0">
<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: F2x cusp not found, Multiple candidates for F2o cusp, One of F2 cusps was derived from the other, Unidentified traces above foF2</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" >
2026.10.24 (297) 21:30:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.40" 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">
FF202629710242130009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="28" >
<URSI ID="00" Val="10.550" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.311" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="24.381" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="1.050" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="1.750" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="6.100" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.850" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="425.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="425.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="34" Val="90.000" Name="h`Es" 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="0.200" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.950" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="580.000" 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="0.405" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="6.100" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="6.100" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="486.614" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="391.766" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.860" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="1.050" Description="Minimum frequency of Es-layer" Units="MHz" />
<URSI ID="94" Val="138.610" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="41.636" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="71.183" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="136.990" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="2.040" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="90">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
425.000 426.250 427.500 428.750 430.000 425.000 425.000 428.333 431.667 435.000 436.250 437.500 438.750 440.000 442.500 445.000 447.500 450.000 450.000 450.000 445.000 445.000 447.143 449.286 451.429 453.571 455.714 457.857 460.000 462.083 464.167 466.250 468.333 470.417 472.500 474.583 476.667 478.750 480.833 482.917 485.000 487.083 489.167 491.250 493.333 495.417 497.500 499.583 501.667 503.750 505.833 507.917 510.000 510.000 515.000 515.000 520.000 520.000 520.000 525.000 527.500 530.000 532.500 535.000 535.000 535.000 540.000 545.000 550.000 550.000 554.286 558.571 562.857 567.143 571.429 575.714 580.000 580.000 586.018 592.631 599.930 608.030 617.069 627.220 638.703 651.797 666.869 684.401 705.050 729.730
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 0 0 0 72 72 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 63 0 60 72 57 66 51 57 72 57 0 60 0 63 75 78 0 72 66 72 0 0 0 0 57 0 66 66 72 66 63 60 57 57 57 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 -1.953125 -1.953125 -1.171875 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.171875 -1.171875 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -2.734375 -1.953125 -2.734375 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -2.734375 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 1.953125 -1.953125 2.734375 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -2.734375 -2.734375 -1.953125 -1.953125 -2.734375 -1.953125 -2.734375 -2.734375 -1.953125 -2.734375 -2.734375 -2.734375 -1.953125 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 2.734375
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="Es" Polarization="O" Num="15">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
1.05 1.1 1.15 1.2 1.25 1.3 1.35 1.4 1.45 1.5 1.55 1.6 1.65 1.7 1.75
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
90.000 90.000 90.000 90.000 90.000 95.000 95.000 95.000 94.167 93.333 92.500 91.667 90.833 90.000 95.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
66 69 72 69 66 72 69 72 0 0 0 0 0 66 75
</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
</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" >
92.601 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 139.241 140.0 145.0 150.0 155.0 160.0 165.0 168.483 170.0 175.0 180.0 185.0 190.0 195.0 197.724 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 486.614 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.268 0.351 0.392 0.405 0.4 0.387 0.362 0.326 0.271 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.211 0.246 0.281 0.316 0.351 0.386 0.405 0.429 0.484 0.543 0.607 0.676 0.751 0.833 0.921 1.016 1.119 1.231 1.351 1.479 1.617 1.764 1.92 2.085 2.259 2.442 2.634 2.834 3.043 3.259 3.483 3.713 3.95 4.194 4.442 4.696 4.954 5.216 5.481 5.749 6.018 6.289 6.56 6.83 7.1 7.366 7.63 7.889 8.143 8.391 8.631 8.862 9.084 9.294 9.492 9.676 9.845 9.999 10.135 10.254 10.353 10.433 10.493 10.531 10.549 10.55 10.548 10.536 10.515 10.485 10.447 10.4 10.346 10.285 10.217 10.143 10.063 9.978 9.887 9.793 9.693 9.591 9.484 9.374 9.262 9.147 9.03 8.911 8.79 8.667 8.544 8.419 8.294 8.168 8.042 7.915 7.789 7.663 7.536 7.411 7.285 7.161 7.037 6.913 6.791 6.67 6.55 6.431 6.313 6.196 6.081 5.967 5.854 5.743 5.633 5.525 5.418 5.313 5.209 5.106 5.006 4.907 4.809 4.713 4.619 4.526 4.434 4.345 4.256 4.17 4.085 4.001 3.919 3.838 3.759 3.681 3.605 3.53 3.456 3.384 3.314 3.244 3.176 3.11 3.044 2.98 2.918 2.856 2.796 2.736 2.679 2.622 2.566 2.512 2.458 2.406 2.355 2.304 2.255 2.207 2.16 2.114 2.069 2.024 1.981 1.938 1.897 1.856 1.816

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.405" PeakHeight="110.0" Num="3" Error="0.0">
-20.347 3.175 -0.227
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.405" EndFrequency="10.55" PeakHeight="486.614" Num="5" zHalfNm="391.766" Error="1.607">
-290.537 -0.507 3.236 -1.925 0.843
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="87.724" Depth="0.205"/>
<TopsideChapman PeakHeight="486.614" PeakDensity="1380924.4" PeakScaleHeight="71.183" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
