<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-15 -288 08:10:00.000"
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 1 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 45% PACIFIC flags: Moderate F-spread, 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" >
2026.10.15 (288) 08:10:00</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">
FF202628810150810009039031101000005015000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="5.150" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.394" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="12.331" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.400" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.400" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="5.500" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="410.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="410.000" 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="0.100" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="4.350" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="460.000" 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="0.570" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.400" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.400" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="479.713" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="356.224" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="4.171" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="175.755" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="12.745" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="92.199" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="168.150" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="2.360" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="36">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
3.4 3.45 3.5 3.55 3.6 3.65 3.7 3.75 3.8 3.85 3.9 3.95 4.0 4.05 4.1 4.15 4.2 4.25 4.3 4.35 4.4 4.45 4.5 4.55 4.6 4.65 4.7 4.75 4.8 4.85 4.9 4.95 5.0 5.05 5.1 5.15
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
410.000 415.000 416.667 418.333 420.000 421.667 423.333 425.000 427.500 430.000 432.500 435.000 438.333 441.667 445.000 448.333 451.667 455.000 457.500 460.000 486.875 513.750 540.625 567.500 594.375 621.250 648.125 675.000 676.260 677.864 679.972 682.870 687.102 693.864 706.392 737.546
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 0 0 0 63 0 0 0 0 0 0 57 0 0 0 0 0 0 0 57 0 0 0 0 0 0 0 57 0 0 0 0 63 63 63 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 -0.390625 -1.171875 0.390625 -0.390625 -1.171875 0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 0.390625 0.390625 -1.171875 0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 -1.171875 0.390625 0.390625 1.953125 0.390625 0.390625 0.390625 -2.734375 -0.390625 -0.390625 1.171875 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" >
91.233 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 136.964 140.0 145.0 150.0 155.0 160.0 163.929 165.0 170.0 175.0 180.0 185.0 190.0 190.893 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 479.713 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.377 0.494 0.552 0.57 0.562 0.538 0.495 0.428 0.321 0.257 0.257 0.257 0.257 0.257 0.257 0.257 0.269 0.327 0.386 0.444 0.502 0.56 0.57 0.638 0.696 0.748 0.797 0.847 0.897 0.949 1.003 1.06 1.12 1.183 1.251 1.324 1.403 1.487 1.578 1.675 1.779 1.889 2.006 2.127 2.253 2.381 2.511 2.641 2.77 2.898 3.024 3.148 3.269 3.387 3.502 3.615 3.724 3.829 3.932 4.031 4.127 4.219 4.307 4.392 4.473 4.551 4.624 4.693 4.758 4.819 4.875 4.926 4.972 5.014 5.05 5.08 5.105 5.125 5.139 5.147 5.15 5.15 5.148 5.144 5.137 5.127 5.114 5.1 5.082 5.063 5.041 5.018 4.992 4.965 4.936 4.905 4.873 4.839 4.804 4.768 4.73 4.691 4.652 4.611 4.569 4.527 4.484 4.44 4.396 4.351 4.305 4.259 4.213 4.166 4.119 4.072 4.025 3.977 3.93 3.882 3.834 3.787 3.739 3.692 3.644 3.597 3.55 3.503 3.456 3.409 3.363 3.317 3.271 3.226 3.181 3.136 3.091 3.047 3.003 2.96 2.917 2.875 2.832 2.791 2.749 2.708 2.668 2.628 2.588 2.549 2.511 2.472 2.435 2.397 2.36 2.324 2.288 2.253 2.218 2.183 2.149 2.115 2.082 2.049 2.017 1.985 1.953 1.922 1.892 1.862 1.832 1.802 1.774 1.745 1.717 1.689 1.662 1.635 1.609 1.583 1.557 1.532 1.507 1.482 1.458 1.435

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.57" PeakHeight="110.0" Num="3" Error="0.0">
-23.31 5.068 -0.525
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.57" EndFrequency="5.15" PeakHeight="479.713" Num="5" zHalfNm="356.224" Error="15.648">
-298.265 12.86 -7.183 -0.474 4.242
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="80.893" Depth="0.313"/>
<TopsideChapman PeakHeight="479.713" PeakDensity="329063.28" PeakScaleHeight="92.199" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
