<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-17 -290 16:40:00.000"
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 11 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 90% PACIFIC flags: One of F2 cusps was derived from the other</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" >
2026.10.17 (290) 16:40:00</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">
FF202629010171640009039031101000005015000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="26" >
<URSI ID="00" Val="7.050" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.853" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="20.112" 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="7.300" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="390.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="390.000" 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="0.250" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="7.000" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="450.729" 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="3.251" 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="/" />
<Modeled Name="foF1p" Val="4.296" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="276.490" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="175.202" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.651" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="109.018" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="17.487" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="64.963" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="180.540" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.020" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="25">
<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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
390.000 390.000 390.000 395.000 400.000 405.000 405.000 406.667 408.333 410.000 410.000 415.000 415.000 415.000 420.000 425.000 425.000 430.000 430.000 435.000 435.000 439.311 444.463 450.729 458.516
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 60 57 0 0 0 0 0 0 57 60 60 66 63 66 60 69 63 69 66 69 69 63 57 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
</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" >
89.505 90.0 95.0 100.0 105.0 110.0 112.128 114.255 115.0 116.383 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 276.49 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.239 2.187 2.814 3.145 3.251 3.129 3.129 3.172 3.251 3.35 3.501 3.664 3.833 4.002 4.165 4.32 4.467 4.606 4.737 4.861 4.98 5.095 5.205 5.312 5.417 5.518 5.618 5.717 5.814 5.911 6.007 6.103 6.199 6.297 6.395 6.496 6.6 6.707 6.82 6.938 7.04 7.05 7.048 7.039 7.022 6.997 6.967 6.93 6.887 6.839 6.785 6.727 6.665 6.598 6.528 6.455 6.378 6.299 6.218 6.134 6.049 5.962 5.873 5.784 5.693 5.602 5.51 5.417 5.325 5.232 5.14 5.047 4.955 4.863 4.772 4.681 4.591 4.502 4.414 4.326 4.24 4.154 4.069 3.986 3.903 3.822 3.742 3.663 3.585 3.509 3.434 3.36 3.287 3.215 3.145 3.076 3.008 2.942 2.876 2.812 2.75 2.688 2.628 2.568 2.51 2.453 2.398 2.343 2.29 2.238 2.186 2.136 2.087 2.039 1.992 1.946 1.901 1.857 1.814 1.772 1.731 1.691 1.651 1.613 1.575 1.539 1.503 1.468 1.433 1.4 1.367 1.335 1.304 1.273 1.243 1.214 1.185 1.157 1.13 1.104 1.078 1.052 1.027 1.003 0.979 0.956 0.934 0.912 0.89 0.869 0.849 0.829 0.809 0.79 0.771 0.753 0.735 0.718 0.701 0.684 0.668 0.652 0.637 0.622 0.607 0.592 0.578 0.565 0.551 0.538 0.525 0.513 0.501 0.489 0.477 0.466 0.455 0.444 0.434 0.423 0.413 0.403 0.394 0.385 0.375 0.366 0.358

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.251" PeakHeight="110.0" Num="3" Error="0.0">
-30.397 12.999 -3.097
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.251" EndFrequency="7.05" PeakHeight="276.49" Num="5" zHalfNm="175.202" Error="2.482">
-126.778 -53.888 28.749 -8.889 0.699
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="6.383" Depth="0.122"/>
<TopsideChapman PeakHeight="276.49" PeakDensity="616656.3" PeakScaleHeight="64.963" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
