<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-23 -296 15:20:00.000"
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: 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" >
2026.10.23 (296) 15:20:00</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">
FF202629610231520009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="10.500" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.452" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="25.745" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="6.600" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="6.600" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.000" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="350.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="350.000" 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="9.800" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="522.193" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="3.379" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="6.600" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="6.600" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.355" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="371.159" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="248.216" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.997" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="156.148" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="51.944" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="87.349" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="207.490" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.240" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="79">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
350.000 355.000 355.000 360.000 361.667 363.333 365.000 365.000 368.333 371.667 375.000 375.000 377.777 380.554 383.332 386.109 388.886 391.663 394.441 397.218 399.995 402.772 405.550 408.327 411.104 413.881 416.659 419.436 422.213 424.990 427.767 430.545 433.322 436.099 438.876 441.654 444.431 447.208 449.985 452.763 455.540 458.317 461.094 463.872 466.649 469.426 472.203 474.980 477.758 480.535 483.312 486.089 488.867 491.644 494.421 497.198 499.976 502.753 505.530 508.307 511.085 513.862 516.639 519.416 522.193 526.193 530.561 535.350 540.000 545.000 555.000 560.000 570.000 580.000 590.000 600.000 615.000 630.000 652.956
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 60 60 60 0 0 60 63 0 0 51 57 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 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 -1.953125 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 -1.171875 -1.171875 2.734375 -1.953125 2.734375 -1.953125 1.953125 0.390625 -1.171875 -0.390625 -1.171875 1.171875 1.953125 1.171875 -2.734375 -1.171875 0.390625 -2.734375 0.390625 2.734375 0.390625 -1.171875 -1.171875 -1.171875 1.953125 -0.390625 1.953125 1.171875 -2.734375 -2.734375 -1.953125 1.953125 -2.734375 -2.734375 2.734375 -0.390625 2.734375 -1.171875 1.171875 -1.953125 -1.953125 1.171875 -1.953125 0.390625 1.953125 1.953125 -2.734375 1.171875 0.390625 1.953125 1.953125 -1.953125 -1.171875 -1.171875 -2.734375 -0.390625 1.953125 2.734375 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" >
89.485 90.0 95.0 100.0 105.0 110.0 111.596 113.193 114.789 115.0 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 371.159 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.241 2.273 2.924 3.269 3.379 3.256 3.256 3.379 3.386 3.558 3.727 3.894 4.058 4.221 4.382 4.54 4.697 4.853 5.007 5.159 5.31 5.46 5.608 5.756 5.902 6.048 6.193 6.337 6.48 6.624 6.766 6.908 7.05 7.192 7.334 7.475 7.617 7.758 7.9 8.041 8.183 8.325 8.468 8.61 8.753 8.896 9.039 9.182 9.324 9.466 9.606 9.744 9.879 10.009 10.132 10.245 10.343 10.422 10.475 10.499 10.5 10.498 10.49 10.475 10.454 10.428 10.396 10.359 10.316 10.269 10.218 10.162 10.101 10.037 9.97 9.899 9.825 9.747 9.667 9.585 9.5 9.412 9.323 9.232 9.139 9.045 8.949 8.852 8.754 8.655 8.555 8.454 8.353 8.251 8.149 8.047 7.945 7.842 7.739 7.637 7.534 7.432 7.33 7.229 7.128 7.027 6.927 6.828 6.729 6.63 6.533 6.436 6.34 6.245 6.15 6.057 5.964 5.873 5.782 5.692 5.603 5.515 5.428 5.342 5.257 5.173 5.09 5.009 4.928 4.848 4.769 4.691 4.615 4.539 4.464 4.391 4.318 4.246 4.176 4.106 4.038 3.97 3.904 3.838 3.773 3.71 3.647 3.585 3.524 3.465 3.406 3.348 3.291 3.234 3.179 3.125 3.071 3.018 2.966 2.915 2.865 2.816 2.767 2.719 2.672 2.626 2.581 2.536 2.492 2.449 2.406 2.364 2.323 2.283 2.243 2.204 2.165 2.128 2.09 2.054 2.018 1.983 1.948 1.914 1.88 1.847 1.815

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.379" PeakHeight="110.0" Num="3" Error="0.0">
-30.492 13.139 -3.162
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.379" EndFrequency="10.5" PeakHeight="371.159" Num="5" zHalfNm="248.216" Error="1.57">
-221.511 -55.802 25.505 -5.081 0.519
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="4.789" Depth="0.123"/>
<TopsideChapman PeakHeight="371.159" PeakDensity="1367866.0" PeakScaleHeight="87.349" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
