<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-01 -274 21:16:00.000"
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="8.0">
<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: 40% PACIFIC flags: Moderate F-spread, F2x cusp not found, Multiple candidates for F2o cusp, 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" >
2026.10.01 (274) 21:16:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.37" 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">
FF202627410012116009039031101000005008000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="27" >
<URSI ID="00" Val="1.500" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.359" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="3.538" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="1.100" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="2.550" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="1.100" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="1.800" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="450.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="450.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="34" Val="80.000" 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="0.150" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="1.500" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="614.741" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.594" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="1.100" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="1.100" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="410.433" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="295.140" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="10.008" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="1.900" Description="Minimum frequency of Es-layer" Units="MHz" />
<URSI ID="94" Val="139.515" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="1.019" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="81.476" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="195.080" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.240" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="9">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
1.1 1.15 1.2 1.25 1.3 1.35 1.4 1.45 1.5
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
450.000 461.667 476.729 493.440 512.085 533.020 556.695 583.686 614.741
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
21 0 0 0 9 12 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
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="Es" Polarization="O" Num="14">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
1.9 1.95 2.0 2.05 2.1 2.15 2.2 2.25 2.3 2.35 2.4 2.45 2.5 2.55
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
80.000 80.000 80.000 80.000 80.000 80.000 80.000 80.000 80.000 80.000 80.000 80.000 82.500 85.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
15 0 0 0 0 0 12 0 0 18 0 24 0 12
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 1.171875 0.390625 -2.734375 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" >
91.129 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 136.626 140.0 145.0 150.0 155.0 160.0 163.251 165.0 170.0 175.0 180.0 185.0 189.877 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 410.433 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.394 0.515 0.575 0.594 0.586 0.56 0.515 0.444 0.33 0.274 0.274 0.274 0.274 0.274 0.274 0.274 0.295 0.355 0.415 0.475 0.535 0.594 0.595 0.619 0.642 0.665 0.688 0.71 0.732 0.753 0.775 0.797 0.819 0.841 0.863 0.885 0.907 0.929 0.951 0.973 0.994 1.016 1.038 1.06 1.082 1.104 1.125 1.147 1.169 1.19 1.212 1.234 1.255 1.277 1.298 1.319 1.341 1.362 1.383 1.403 1.423 1.442 1.46 1.475 1.488 1.497 1.5 1.5 1.5 1.498 1.495 1.492 1.488 1.482 1.476 1.469 1.461 1.453 1.444 1.434 1.424 1.413 1.401 1.389 1.377 1.364 1.351 1.337 1.323 1.309 1.295 1.28 1.265 1.25 1.235 1.22 1.204 1.189 1.173 1.158 1.142 1.126 1.111 1.095 1.079 1.064 1.048 1.032 1.017 1.001 0.986 0.971 0.956 0.941 0.926 0.911 0.897 0.882 0.868 0.854 0.839 0.826 0.812 0.798 0.785 0.772 0.758 0.745 0.733 0.72 0.708 0.695 0.683 0.671 0.66 0.648 0.637 0.625 0.614 0.603 0.593 0.582 0.572 0.561 0.551 0.541 0.531 0.522 0.512 0.503 0.494 0.485 0.476 0.467 0.459 0.45 0.442 0.434 0.426 0.418 0.41 0.403 0.395 0.388 0.381 0.374 0.367 0.36 0.353 0.347 0.34 0.334 0.328 0.322 0.316 0.31 0.304 0.298 0.293 0.287 0.282 0.277 0.271 0.266 0.261 0.256

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.594" PeakHeight="110.0" Num="3" Error="0.0">
-23.602 5.303 -0.572
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.594" EndFrequency="1.5" PeakHeight="410.433" Num="5" zHalfNm="295.14" Error="2.307">
-183.852 -51.722 17.826 -3.722 0.914
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="79.877" Depth="0.32"/>
<TopsideChapman PeakHeight="410.433" PeakDensity="27915.633" PeakScaleHeight="81.476" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
