<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-24 -297 21:20:00.000"
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) 21:20:00</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">
FF202629710242120009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="28" >
<URSI ID="00" Val="10.550" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.395" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="25.266" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.500" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="3.250" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="6.150" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.900" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="405.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="405.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="34" Val="121.667" 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="0.350" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.850" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="541.667" 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="0.503" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="6.150" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="6.150" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="464.788" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="373.430" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.970" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="2.500" Description="Minimum frequency of Es-layer" Units="MHz" />
<URSI ID="94" Val="133.214" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="40.117" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="68.540" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="132.230" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="2.020" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="89">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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" >
405.000 410.000 410.000 410.000 410.000 415.000 415.000 415.000 415.000 415.000 417.500 420.000 422.500 425.000 425.000 427.500 430.000 431.757 433.514 435.270 437.027 438.784 440.541 442.297 444.054 445.811 447.568 449.324 451.081 452.838 454.595 456.351 458.108 459.865 461.622 463.378 465.135 466.892 468.649 470.405 472.162 473.919 475.676 477.432 479.189 480.946 482.703 484.459 486.216 487.973 489.730 491.486 493.243 495.000 495.000 495.000 500.000 500.000 500.000 505.000 510.000 510.000 510.000 515.000 520.000 520.000 525.000 525.000 530.000 535.000 535.000 540.000 540.000 540.000 541.667 546.692 552.191 558.233 564.902 572.303 580.562 589.837 600.329 612.293 626.064 642.083 660.950 683.500 710.926
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
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 0 0 0 0 0 0 0 60 0 57 69 72 66 75 72 72 63 69 60 72 66 66 66 63 66 63 69 69 69 60 0 57 63 72 72 72 66 48 57 45 0 0 0 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-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 -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 -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 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 0.390625 -1.953125 -1.953125 -1.953125 -2.734375 -2.734375 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -2.734375 -1.953125 -1.953125 -2.734375 -2.734375 -1.953125 -1.953125 -1.953125 -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 -1.171875 0.390625 1.953125 0.390625 1.953125
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="Es" Polarization="O" Num="16">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.5 2.55 2.6 2.65 2.7 2.75 2.8 2.85 2.9 2.95 3.0 3.05 3.1 3.15 3.2 3.25
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
115.000 110.000 105.000 107.500 110.000 112.500 115.000 117.500 120.000 120.000 122.000 124.000 126.000 128.000 130.000 130.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 66 0 0 0 0 0 0 0 0 0 0 0 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 1.171875 0.390625 -0.390625 0.390625 0.390625 -1.171875 1.171875 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" >
91.624 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 137.888 140.0 145.0 150.0 155.0 160.0 165.0 165.777 170.0 175.0 180.0 185.0 190.0 193.665 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 464.788 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.333 0.436 0.487 0.503 0.496 0.476 0.439 0.382 0.292 0.212 0.212 0.212 0.212 0.212 0.212 0.212 0.212 0.256 0.308 0.36 0.413 0.465 0.503 0.52 0.587 0.658 0.734 0.817 0.905 1.001 1.105 1.217 1.338 1.468 1.607 1.756 1.915 2.083 2.262 2.45 2.647 2.854 3.07 3.294 3.525 3.765 4.011 4.264 4.522 4.786 5.054 5.326 5.601 5.878 6.157 6.437 6.716 6.995 7.272 7.545 7.815 8.079 8.337 8.587 8.829 9.059 9.279 9.485 9.676 9.852 10.01 10.15 10.271 10.371 10.449 10.506 10.539 10.55 10.55 10.544 10.528 10.502 10.466 10.421 10.369 10.308 10.24 10.165 10.083 9.996 9.903 9.805 9.703 9.596 9.486 9.372 9.255 9.136 9.014 8.889 8.764 8.636 8.508 8.378 8.248 8.117 7.985 7.854 7.723 7.592 7.461 7.33 7.201 7.072 6.943 6.816 6.69 6.565 6.441 6.319 6.198 6.078 5.959 5.843 5.727 5.613 5.501 5.391 5.282 5.174 5.069 4.965 4.863 4.762 4.663 4.566 4.47 4.377 4.284 4.194 4.105 4.018 3.932 3.848 3.766 3.685 3.606 3.528 3.452 3.377 3.304 3.232 3.162 3.093 3.025 2.959 2.894 2.831 2.769 2.708 2.648 2.59 2.533 2.477 2.422 2.369 2.316 2.265 2.215 2.166 2.118 2.071 2.025 1.98 1.936 1.892 1.85 1.809 1.769 1.729 1.691 1.653 1.616 1.58 1.545 1.51

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.503" PeakHeight="110.0" Num="3" Error="0.0">
-22.353 4.38 -0.403
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.503" EndFrequency="10.55" PeakHeight="464.788" Num="5" zHalfNm="373.43" Error="1.288">
-271.363 -2.077 3.307 -1.795 0.805
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="83.665" Depth="0.291"/>
<TopsideChapman PeakHeight="464.788" PeakDensity="1380924.4" PeakScaleHeight="68.54" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
