<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-16 -289 17:40:00.000"
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 44 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 45% PACIFIC flags: F2o cusp not found, Multiple candidates for F2x cusp, One of F2 cusps was derived from the other, F2O model cusp does not fit trace</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" >
2026.10.16 (289) 17:40:00</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">
FF202628910161740009039031101000005015000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="10.450" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.283" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="23.860" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.900" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.900" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.750" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="345.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="345.000" 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="88" Val="9.900" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="596.748" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="3.049" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.900" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.900" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.198" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="421.015" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="272.857" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="10.044" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="196.579" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="62.462" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="107.408" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="232.320" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.530" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="92">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
345.000 345.000 350.000 350.000 350.000 350.000 350.000 352.500 355.000 360.000 365.000 365.000 365.000 365.000 370.000 370.000 375.000 375.000 380.000 380.000 385.000 385.000 385.000 390.000 395.000 395.000 398.668 402.336 406.004 409.673 413.341 417.009 420.677 424.345 428.013 431.681 435.350 439.018 442.686 446.354 450.022 453.690 457.358 461.027 464.695 468.363 472.031 475.699 479.367 483.035 486.703 490.372 494.040 497.708 501.376 505.044 508.712 512.380 516.049 519.717 523.385 527.053 530.721 534.389 538.057 541.726 545.394 549.062 552.730 556.398 560.066 563.734 567.403 571.071 574.739 578.407 582.075 585.743 589.411 593.080 596.748 600.416 604.084 620.000 630.000 650.000 665.000 685.000 710.000 735.000 760.000 792.791
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
63 72 63 0 72 69 69 0 69 0 63 0 72 66 69 72 69 72 69 69 66 69 69 66 57 66 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 0 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 -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 -0.390625 0.390625 1.953125 1.953125 -2.734375 -2.734375 -0.390625 -2.734375 2.734375 -1.171875 -2.734375 -0.390625 1.953125 1.953125 0.390625 1.171875 1.171875 0.390625 2.734375 -1.171875 -1.953125 0.390625 1.171875 2.734375 -2.734375 1.171875 0.390625 2.734375 2.734375 -0.390625 -2.734375 0.390625 2.734375 1.171875 2.734375 -0.390625 -1.171875 -0.390625 -1.171875 2.734375 1.171875 1.171875 -0.390625 -0.390625 1.171875 1.171875 1.171875 2.734375 -1.953125 1.953125 1.171875 -2.734375 -2.734375 0.390625 -0.390625 1.171875 -0.390625 -1.953125 -2.734375 -1.953125 -2.734375
</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" >
89.537 90.0 95.0 100.0 105.0 110.0 112.998 115.0 115.995 118.993 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 421.015 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.237 2.05 2.639 2.95 3.049 2.927 2.927 2.927 3.049 3.079 3.222 3.36 3.495 3.629 3.764 3.898 4.034 4.17 4.308 4.447 4.587 4.729 4.872 5.015 5.159 5.304 5.449 5.595 5.74 5.886 6.031 6.176 6.32 6.464 6.607 6.749 6.891 7.031 7.171 7.31 7.448 7.586 7.722 7.857 7.991 8.125 8.257 8.388 8.518 8.647 8.774 8.9 9.024 9.147 9.267 9.386 9.501 9.614 9.723 9.829 9.929 10.024 10.112 10.193 10.265 10.327 10.377 10.415 10.439 10.45 10.45 10.449 10.443 10.433 10.419 10.402 10.38 10.355 10.326 10.294 10.258 10.22 10.178 10.134 10.087 10.037 9.984 9.93 9.873 9.814 9.753 9.69 9.625 9.558 9.49 9.42 9.349 9.277 9.203 9.128 9.052 8.975 8.898 8.819 8.74 8.66 8.58 8.499 8.417 8.335 8.253 8.171 8.088 8.005 7.922 7.839 7.756 7.673 7.59 7.507 7.424 7.342 7.259 7.177 7.096 7.014 6.933 6.852 6.772 6.692 6.612 6.533 6.455 6.377 6.299 6.222 6.145 6.07 5.994 5.919 5.845 5.772 5.699 5.626 5.555 5.484 5.413 5.344 5.274 5.206 5.138 5.071 5.005 4.939 4.874 4.81 4.746 4.683 4.621 4.559 4.498 4.438 4.378 4.319 4.261 4.203 4.146 4.09 4.034 3.979 3.925 3.872 3.819 3.766 3.714 3.663 3.613 3.563 3.514 3.465 3.417 3.37 3.323 3.277 3.231 3.186 3.142

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.049" PeakHeight="110.0" Num="3" Error="0.0">
-30.236 12.762 -2.989
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.049" EndFrequency="10.45" PeakHeight="421.015" Num="5" zHalfNm="272.857" Error="3.492">
-277.81 -39.727 19.98 -6.255 1.79
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="8.993" Depth="0.122"/>
<TopsideChapman PeakHeight="421.015" PeakDensity="1354869.8" PeakScaleHeight="107.408" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
