<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-31 -304 19:00:00.000"
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 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" >
2026.10.31 (304) 19:00:00</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">
FF202630410311900009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="12.200" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.660" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="32.452" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="8.650" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="8.650" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="12.500" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="395.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="395.000" 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="0.200" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="11.600" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="470.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="2.570" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="8.650" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="8.650" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="349.057" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="255.082" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="10.388" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="127.781" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="53.863" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="66.878" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="150.550" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.390" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="72">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 10.6 10.65 10.7 10.75 10.8 10.85 10.9 10.95 11.0 11.05 11.1 11.15 11.2 11.25 11.3 11.35 11.4 11.45 11.5 11.55 11.6 11.65 11.7 11.75 11.8 11.85 11.9 11.95 12.0 12.05 12.1 12.15 12.2
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
395.000 396.667 398.333 400.000 400.000 400.000 405.000 405.000 405.000 405.000 405.000 405.000 405.000 405.000 405.000 405.000 405.833 406.667 407.500 408.333 409.167 410.000 411.000 412.000 413.000 414.000 415.000 415.000 420.000 420.000 425.000 425.000 425.000 425.000 427.500 430.000 430.000 430.000 430.000 430.000 430.000 435.000 435.000 435.000 435.000 440.000 440.000 440.000 445.000 445.000 450.000 450.000 455.000 455.000 460.000 460.000 465.000 465.000 470.000 470.000 475.000 478.768 483.026 487.875 493.447 499.917 507.521 516.587 527.581 541.189 558.472 581.149
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 0 0 60 60 0 57 0 0 57 57 57 60 60 57 51 0 0 0 60 0 60 0 51 0 0 51 63 63 63 51 0 0 66 0 54 0 0 60 60 57 57 54 0 0 48 48 48 54 51 48 45 45 51 51 60 57 51 45 48 48 0 51 54 54 57 45 51 48 54 51 51
</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 1.171875 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 -0.390625 -0.390625 -0.390625 -0.390625 -1.171875 -1.171875 -0.390625 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875
</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" >
89.625 90.0 95.0 100.0 105.0 110.0 115.0 115.235 120.0 120.471 125.0 125.706 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 349.057 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.231 1.726 2.225 2.487 2.57 2.457 2.446 2.446 2.446 2.553 2.57 2.716 2.897 3.091 3.299 3.52 3.753 3.997 4.249 4.507 4.767 5.028 5.288 5.546 5.801 6.052 6.3 6.544 6.785 7.023 7.258 7.49 7.72 7.948 8.175 8.399 8.623 8.846 9.067 9.288 9.509 9.729 9.949 10.168 10.387 10.604 10.821 11.035 11.245 11.45 11.645 11.825 11.981 12.104 12.18 12.2 12.2 12.191 12.169 12.136 12.091 12.035 11.97 11.895 11.812 11.72 11.621 11.514 11.402 11.283 11.159 11.031 10.898 10.761 10.62 10.477 10.33 10.182 10.032 9.88 9.726 9.572 9.417 9.261 9.106 8.95 8.795 8.639 8.485 8.331 8.178 8.026 7.876 7.726 7.578 7.432 7.287 7.143 7.002 6.862 6.724 6.587 6.453 6.321 6.19 6.062 5.935 5.811 5.689 5.568 5.45 5.334 5.22 5.108 4.998 4.89 4.784 4.68 4.577 4.477 4.379 4.283 4.189 4.096 4.005 3.917 3.83 3.744 3.661 3.579 3.499 3.421 3.344 3.269 3.195 3.124 3.053 2.984 2.917 2.851 2.786 2.723 2.661 2.601 2.542 2.484 2.428 2.372 2.318 2.266 2.214 2.163 2.114 2.066 2.018 1.972 1.927 1.883 1.84 1.798 1.757 1.716 1.677 1.639 1.601 1.564 1.528 1.493 1.459 1.425 1.393 1.361 1.329 1.299 1.269 1.24 1.211 1.183 1.156 1.129 1.103 1.078 1.053 1.029 1.005 0.982 0.959

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.57" PeakHeight="110.0" Num="3" Error="0.0">
-29.789 12.117 -2.703
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.57" EndFrequency="12.2" PeakHeight="349.057" Num="5" zHalfNm="255.082" Error="2.764">
-200.394 -39.25 24.739 -10.119 1.673
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="15.706" Depth="0.124"/>
<TopsideChapman PeakHeight="349.057" PeakDensity="1846650.1" PeakScaleHeight="66.878" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
